README: update

README.md

@@ -4,7 +4,7 @@ An action that wraps `brew bump-formula-pr` to ease the process of updating the
 
 ## Usage
 
-One should use the [Personal Access Token](https://github.com/settings/tokens/new?scopes=public_repo) for `token` input to this Action, not the default `GITHUB_TOKEN`, because `brew bump-formula-pr` creates a fork of the formula's tap repository (if needed) and then creates a PR.
+One should use the [Personal Access Token](https://github.com/settings/tokens/new?scopes=public_repo) for `token` input to this Action, not the default `GITHUB_TOKEN`, because `brew bump-formula-pr` creates a fork of the formula's tap repository (if needed) and then creates a pull request.
 
 It is best to use this Action when a new tag is pushed:
 
@@ -22,9 +22,15 @@ because then, the script will extract all needed informations by itself, you jus
   uses: dawidd6/action-homebrew-bump-formula@v2
   with:
     token: ${{secrets.TOKEN}}
+    # For example:
+    #   dawidd6/tap/actions-updater
+    # or if the formula is in the core tap:
+    #   lazygit
     formula: USER/REPO/FORMULA
+    # Optional, will be determined automatically
+    tag: ${{github.ref}}
+    # Optional, will be determined automatically
+    revision: ${{github.sha}}
     # Optional, if don't want to check for already open PRs
     force: true
 ```
-
-**note:** `USER/REPO/FORMULA` can be in the form that `brew install` would accept it. That is, for formula "baz" in foo's tap repo "homebrew-bar", one could use `foo/bar/baz` instead of `foo/homebrew-bar/baz`, but it is not necessary. This is because Homebrew expects tap names to have the `homebrew-` prefix.