[DOCS] Updates references to Elasticsearch repo and docs

Author: picandocodigo

docs/advanced-config.asciidoc

@@ -159,7 +159,7 @@ client.search(index: 'myindex', q: 'title:test', headers: {user_agent: "My App"}
 
 The X-Opaque-Id header allows to track certain calls, or associate certain tasks 
 with the client that started them (refer to 
-https://www.elastic.co/guide/en/elasticsearch/reference/master/tasks.html#_identifying_running_tasks[the documentation]). 
+https://www.elastic.co/guide/en/elasticsearch/reference/current/tasks.html#_identifying_running_tasks[the documentation]).
 To use this feature, you need to set an id for `opaque_id` on the client on each 
 request. Example:
 

elasticsearch-api/api-spec-testing/README.md

@@ -91,7 +91,7 @@ To enable logging, set the environment `QUIET` to false before running the tests
 
 The tests use custom [RSpec Matchers](https://www.rubydoc.info/gems/rspec-expectations/RSpec/Matchers) defined in `api-spec-testing/rspec_matchers.rb`.
 
-From the [Rest API test docs](https://github.com/elastic/elasticsearch/tree/master/rest-api-spec/src/main/resources/rest-api-spec/test#do):
+From the [Rest API test docs](https://github.com/elastic/elasticsearch/tree/main/rest-api-spec/src/main/resources/rest-api-spec/test#do):
 
 ## `catch`
 

elasticsearch-api/lib/elasticsearch/api/actions/bulk.rb

@@ -38,7 +38,7 @@ module Actions
       # @option arguments [String|Array] :body The operation definition and data (action-data pairs), separated by newlines. Array of Strings, Header/Data pairs,
       # or the conveniency "combined" format can be passed, refer to Elasticsearch::API::Utils.__bulkify documentation.
       #
-      # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/docs-bulk.html
+      # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html
       #
       def bulk(arguments = {})
         raise ArgumentError, "Required argument 'body' missing" unless arguments[:body]

elasticsearch-api/lib/elasticsearch/api/actions/cat/aliases.rb

@@ -34,7 +34,7 @@ module Actions
         # @option arguments [String] :expand_wildcards Whether to expand wildcard expression to concrete indices that are open, closed or both. (options: open, closed, hidden, none, all)
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-alias.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-alias.html
         #
         def aliases(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/allocation.rb

@@ -35,7 +35,7 @@ module Actions
         # @option arguments [Boolean] :v Verbose mode. Display column headers
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-allocation.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-allocation.html
         #
         def allocation(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/component_templates.rb

@@ -34,7 +34,7 @@ module Actions
         # @option arguments [Boolean] :v Verbose mode. Display column headers
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-compoentn-templates.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-compoentn-templates.html
         #
         def component_templates(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/count.rb

@@ -32,7 +32,7 @@ module Actions
         # @option arguments [Boolean] :v Verbose mode. Display column headers
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-count.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-count.html
         #
         def count(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/fielddata.rb

@@ -33,7 +33,7 @@ module Actions
         # @option arguments [Boolean] :v Verbose mode. Display column headers
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-fielddata.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-fielddata.html
         #
         def fielddata(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/health.rb

@@ -33,7 +33,7 @@ module Actions
         # @option arguments [Boolean] :v Verbose mode. Display column headers
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat-health.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-health.html
         #
         def health(arguments = {})
           arguments = arguments.clone

elasticsearch-api/lib/elasticsearch/api/actions/cat/help.rb

@@ -28,7 +28,7 @@ module Actions
         # @option arguments [List] :s Comma-separated list of column names or column aliases to sort by
         # @option arguments [Hash] :headers Custom HTTP headers
         #
-        # @see https://www.elastic.co/guide/en/elasticsearch/reference/master/cat.html
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/cat.html
         #
         def help(arguments = {})
           arguments = arguments.clone