Add 0.9.1 to the bug-report dropdown

Author: Fokko

.github/ISSUE_TEMPLATE/iceberg_bug_report.yml

@@ -28,7 +28,8 @@ body:
       description: What Apache Iceberg version are you using?
       multiple: false
       options:
-        - "0.9.0 (latest release)"
+        - "0.9.1 (latest release)"
+        - "0.9.0"
         - "0.8.1"
         - "0.8.0"
         - "0.7.1"