Rootless Docker - Mistake with the repo-avatars parent folder name (#22637)

There was a mistake when choosing the structure for the repo avatars parent folder and it added a spurious /gitea.

The `data` directory should contain folders like:

  - `attachments/`
  - `avatars/`
  - `log/`
  - `repo-avatars/`

docker/rootless/etc/templates/app.ini

@@ -37,7 +37,7 @@ PROVIDER_CONFIG = $GITEA_WORK_DIR/data/sessions
 
 [picture]
 AVATAR_UPLOAD_PATH = $GITEA_WORK_DIR/data/avatars
-REPOSITORY_AVATAR_UPLOAD_PATH = $GITEA_WORK_DIR/data/gitea/repo-avatars
+REPOSITORY_AVATAR_UPLOAD_PATH = $GITEA_WORK_DIR/data/repo-avatars
 
 [attachment]
 PATH = $GITEA_WORK_DIR/data/attachments