Issue template version bump for 1.21

.github/ISSUE_TEMPLATE/1-bug_report.yml

@@ -1,11 +1,11 @@
-name: 1.20.2+ Bug Report
+name: 1.21+ Bug Report
 description: File a bug report
 labels: [bug]
 body:
   - type: markdown
     attributes:
       value: |
-        For bugs experienced with Minecraft 1.20.2+. Older versions are not supported.
+        For bugs experienced with Minecraft 1.21+. Older versions are not supported.
         If any section does not apply, replace its content with "N/A".
 
         Please search for existing bug reports before making your own report.

.github/ISSUE_TEMPLATE/2-crash_report.yml

@@ -1,11 +1,11 @@
-name: 1.20.2+ Crash Report
+name: 1.21+ Crash Report
 description: File a crash report
 labels: [crash]
 body:
   - type: markdown
     attributes:
       value: |
-        For crashes experienced with Minecraft 1.20.2+. Older versions are not supported.
+        For crashes experienced with Minecraft 1.21+. Older versions are not supported.
         If any section does not apply, replace its content with "N/A".
 
         Please search for existing crash reports before making your own report.

.github/ISSUE_TEMPLATE/3-feature_request.yml

@@ -1,11 +1,11 @@
-name: 1.20.2+ Feature Request
+name: 1.21+ Feature Request
 description: Request a new feature
 labels: [feature]
 body:
   - type: markdown
     attributes:
       value: |
-        Feature requests for Minecraft 1.20.2+. Older versions are not supported.
+        Feature requests for Minecraft 1.21+. Older versions are not supported.
         If any section does not apply, replace its contents with "N/A".
         
         Please search for existing feature requests before you make your own request.