Upgrade CLI and use --compare-url-target-revision option (#7)

* Update CLI

* Use --compare-url-target-revision in entrypoint.sh

* Update README

Author: stefanzweifel

README.md

@@ -18,7 +18,7 @@ The Action is best used in a Workflow that listens to the `release`-event and th
 
 The following is an example Workflow ready to be used.
 
-The Workflow checks out the default `main`-branch of your repository, updates the `./CHANGELOG.md`-file with the name and the contents of the just released release and commits the changes back to your repository using [git-auto-commit](https://github.com/stefanzweifel/git-auto-commit-action).
+The Workflow checks out [the target branch of the release](https://docs.github.com/en/rest/reference/releases#create-a-release--parameters), updates the `./CHANGELOG.md`-file with the name and the contents of the just released release and commits the changes back to your repository using [git-auto-commit](https://github.com/stefanzweifel/git-auto-commit-action).
 
 ```yaml
 # .github/workflows/update-changelog.yaml
@@ -36,7 +36,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
         with:
-          ref: main
+          ref: ${{ github.event.release.target_commitish }}
 
       - name: Update Changelog
         uses: stefanzweifel/changelog-updater-action@v1
@@ -47,7 +47,7 @@ jobs:
       - name: Commit updated CHANGELOG
         uses: stefanzweifel/git-auto-commit-action@v4
         with:
-          branch: main
+          branch: ${{ github.event.release.target_commitish }}
           commit_message: Update CHANGELOG
           file_pattern: CHANGELOG.md
 ```

action.yml

@@ -18,6 +18,10 @@ inputs:
     required: false
     default: CHANGELOG.md
     description: Defaults to `CHANGELOG.md`. Path to CHANGELOG.md file.
+  compare-url-target-revision:
+    required: false
+    default: HEAD
+    description: Target revision used in compare URL inside a possible "Unreleased" heading.
 
 branding:
   icon: copy
@@ -31,3 +35,4 @@ runs:
     - ${{ inputs.latest-version }}
     - ${{ inputs.release-date }}
     - ${{ inputs.path-to-changelog }}
+    - ${{ inputs.compare-url-target-revision }}

changelog-updater

@@ -5,4 +5,5 @@ php /changelog-updater update \
 --latest-version="$2" \
 --release-date="$3" \
 --path-to-changelog="$4" \
+--compare-url-target-revision="$5"
 --write