Update issue template version to 12.0

.github/ISSUE_TEMPLATE/issue report.yml

@@ -87,12 +87,8 @@ body:
       label: Jellyfin Server version
       description: What version of Jellyfin are you using?
       options:
+        - 12.0
         - 10.11.11
-        - 10.11.10
-        - 10.11.9
-        - 10.11.8
-        - 10.11.7
-        - 10.11.6
         - Master
         - Unstable
         - Older*