docs: add javadocs to rss feed config & update config with more minimal headers

Author: pot

application/config.json.template

@@ -175,9 +175,9 @@
         "fallbackChannelPattern": "java-news-and-changes",
         "pollIntervalInMinutes": 10,
         "clientRequestHeaders": {
-            "User-Agent": "Mozilla/5.0",
-            "Accept": "application/xhtml+xml,application/xml;",
-            "Accept-Language": "en-US,en;"
+            "User-Agent": "Mozilla",
+            "Accept": "application/xml;",
+            "Accept-Language": "en-US;"
         }
     },
     "memberCountCategoryPattern": "Info"

application/src/main/java/org/togetherjava/tjbot/config/RSSFeedsConfig.java

@@ -13,6 +13,7 @@
  * @param feeds The list of RSS feeds to subscribe to.
  * @param fallbackChannelPattern The pattern used to identify the fallback text channel to use.
  * @param pollIntervalInMinutes The interval (in minutes) for polling the RSS feeds for updates.
+ * @param clientRequestHeaders The headers that will be sent with each request to the RSS feeds.
  */
 public record RSSFeedsConfig(@JsonProperty(value = "feeds", required = true) List<RSSFeed> feeds,
         @JsonProperty(value = "fallbackChannelPattern",
@@ -26,6 +27,7 @@ public record RSSFeedsConfig(@JsonProperty(value = "feeds", required = true) Lis
      * @param feeds The list of RSS feeds to subscribe to.
      * @param fallbackChannelPattern The pattern used to identify the fallback text channel to use.
      * @param pollIntervalInMinutes The interval (in minutes) for polling the RSS feeds for updates.
+     * @param clientRequestHeaders The headers that will be sent with each request to the RSS feeds.
      * @throws NullPointerException if any of the parameters (feeds or fallbackChannelPattern) are
      *         null
      */