workflow: unlock deploy to homebrew-entt (close #397)

.github/workflows/deploy.yml

@@ -37,4 +37,4 @@ jobs:
         git config --local user.name "$GITHUB_ACTOR"
         git add $FORMULA
         git commit -m "Update to ${{ github.ref }}"
-        git push --dry-run origin master
+        git push origin master

TODO

@@ -19,9 +19,6 @@
 
 Next:
 * replace observer class with observer functions
-* workflow to update the single include file automatically
-* workflow to update the doc automatically
-* unlock deploy.yml
 
 * WIP:
  - deprecate snapshot, loader, ...