Doc: Change inline comment to callout (#181)

* Doc: Fix formatting to prepare for doc migration to MD
* Bump to v5.5.3

Author: karenzone

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 5.5.3
+  - [DOC] Rework inline comment to a callout in preparation for upcoming MD conversion [#181](https://github.com/logstash-plugins/logstash-integration-jdbc/pull/181)
+
 ## 5.5.2
   - FIX: the input plugin's prior behaviour of opening a new database connection for each scheduled run (removed in `v5.4.1`) is restored, ensuring that infrequently-run schedules do not hold open connections to their databases indefinitely, _without_ reintroducing the leak [#130](https://github.com/logstash-plugins/logstash-integration-jdbc/pull/130)
 

docs/filter-jdbc_static.asciidoc

@@ -123,7 +123,7 @@ filter {
     add_field => { user_lastname => "%{[user][0][lastname]}" }
     remove_field => ["server", "user"]
     staging_directory => "/tmp/logstash/jdbc_static/import_data"
-    loader_schedule => "* */2 * * *" # run loaders every 2 hours
+    loader_schedule => "* */2 * * *" <8>
     jdbc_user => "logstash"
     jdbc_password => "example"
     jdbc_driver_class => "org.postgresql.Driver"
@@ -153,6 +153,7 @@ returns multiple columns, the data is stored as a JSON object within the field.
 <6> When the user is not found in the database, an event is created using data from the <<plugins-{type}s-{plugin}-local_lookups>> `default hash` setting, and the event is tagged with the list set in <<plugins-{type}s-{plugin}-tag_on_default_use>>.
 <7> Takes data from the JSON object and stores it in top-level event fields for
 easier analysis in Kibana.
+<8> Runs loaders every 2 hours.
 
 Here's a full example:
 

logstash-integration-jdbc.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = 'logstash-integration-jdbc'
-  s.version         = '5.5.2'
+  s.version         = '5.5.3'
   s.licenses = ['Apache License (2.0)']
   s.summary         = "Integration with JDBC - input and filter plugins"
   s.description     = "This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program"