Fix checkboxes

Author: paulhauner

.github/workflows/release.yml

@@ -239,10 +239,10 @@ jobs:
 
                   ## Release Checklist (DELETE ME)
 
-                  - [] Merge `unstable` -> `stable`.
-                  - [] Ensure docker images are published (check `latest` and the version tag).
-                  - [] Prepare Twitter post.
-                  - [] Prepare mailing list email.
+                  - [ ] Merge `unstable` -> `stable`.
+                  - [ ] Ensure docker images are published (check `latest` and the version tag).
+                  - [ ] Prepare Twitter post.
+                  - [ ] Prepare mailing list email.
 
                   ## Summary