[Backport 8.12] Backport documentation fixes to 8.12 (#799)

* Fix indentation issues in indexing.asciidoc (#793)

* Update connecting.asciidoc (#794)

---------

Co-authored-by: Harald Nordgren <[email protected]>

Author: Anaethelion

.doc/connecting.asciidoc

@@ -74,7 +74,7 @@ Once you have the `http_ca.crt` file somewhere accessible pass the content of th
 
 [source,go]
 ------------------------------------
-cert, _ := ioutil.ReadFile("/path/to/http_ca.crt")
+cert, _ := os.ReadFile("/path/to/http_ca.crt")
 
 cfg := elasticsearch.Config{
         Addresses: []string{

.doc/typedapi/examples/indexing.asciidoc

@@ -8,11 +8,11 @@ The standard way of indexing a document is to provide a `struct` to the `Request
 document := struct {
     Id    int    `json:"id"`
     Name  string `json:"name"`
-	Price int    `json:"price"`
+    Price int    `json:"price"`
 }{
     Id:    1,
     Name:  "Foo",
-	Price: 10,
+    Price: 10,
 }
 
 res, err := es.Index("index_name").