fix: gen-migrations workflow

.gitea/workflows/gen-migrations.yml

@@ -29,8 +29,8 @@ jobs:
       - name: 'gen migrations (and push if needed)'
         run: |
               ./scripts/gen_migrations.sh
+              cd migrations
               if ! (git diff-index --quiet --cached HEAD --); then
-                cd migrations
                 git add -A
                 git commit -m 'chore: babe wake up new migrations just dropped'
                 git push