Add instructions and examples

Author: KSXGitHub

README.md

@@ -10,7 +10,7 @@ GitHub Actions to publish AUR package.
 
 ### `pkgbuild`
 
-**Required** Path to PKGBUILD file.
+**Required** Path to PKGBUILD file. This file is often generated by prior steps.
 
 ### `commit_username`
 
@@ -63,3 +63,7 @@ jobs:
 **Tip:** To create secrets (such as `secrets.AUR_USERNAME`, `secrets.AUR_EMAIL`, and `secrets.AUR_SSH_PRIVATE_KEY` above), go to `$YOUR_GITHUB_REPO_URL/settings/secrets`. [Read this for more information](https://help.github.com/en/actions/configuring-and-managing-workflows/creating-and-storing-encrypted-secrets).
 
 **Tip:** This action does not generate PKGBUILD for you, you must generate it yourself (e.g. by using actions before this action).
+
+## Real-world applications
+
+[sane-fmt](https://github.com/KSXGitHub/sane-fmt) has a [workflow](https://github.com/KSXGitHub/sane-fmt/blob/c07ce4f09c0b8dfa902d28753ebb3800268183f5/.github/workflows/deploy.yaml) that builds and uploads executables to GitHub Release then generates PKGBUILD files for and use this very action to update [aur/sane-fmt](https://aur.archlinux.org/packages/sane-fmt) and [aur/sane-fmt-bin](https://aur.archlinux.org/packages/sane-fmt-bin).