Make suggested changes

- Remove titles (we have tags, and forces user to enter something)
 - Remove double space
 - Update discord invite description

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -1,5 +1,4 @@
 name: Bug report
-title: "[Bug] "
 description: Report an issue you encountered when playing OpenRCT2.
 labels: 
 - bug
@@ -34,7 +33,7 @@ body:
 - type: dropdown
   attributes:
     label: Area(s) with issue?
-    description: What things had an issue?  Check all that apply.
+    description: What things had an issue? Check all that apply.
     multiple: true
     options:
       - The bug also exists in RCT2 (vanilla)

.github/ISSUE_TEMPLATE/config.yml

@@ -5,4 +5,4 @@ contact_links:
   about: For localisation issues, go to the localisation repository.
 - name: OpenRCT2 Discord Server
   url: https://discord.gg/ZXZd8D8
-  about: Join our Discord server.
+  about: For help with running or playing the game, join our Discord server.

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -1,5 +1,4 @@
 name: Feature request
-title: "[Feature] "
 description: Request a new feature to be added to OpenRCT2.
 labels:
 - feature
@@ -19,7 +18,7 @@ body:
 - type: dropdown
   attributes:
     label: Feature type
-    description: What things had an issue?  Check all that apply.
+    description: What things had an issue? Check all that apply.
     multiple: true
     options:
       - Quality of life