Add info text

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

README.md

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+# branch-follow-tag
+
+## Use case
+
+Keep a branch always referencing to the most recent tag.
+
+## Inputs
+
+| Input      | Description |
+| ----------- | ----------- |
+| GITHUB_TOKEN      | Automatically provided token, that can be used to authenticate on behalf of the GitHub action, with permissions limited to the repository that contains your workflow       |
+| SSH_PRIVATE_KEY   | Deploy key for push. Must be set in the repository settings. This is used by the action to push the fast-forwarded branch/commit/PR.        |
+| BRANCH | Name of the branch. | 
+
+## Workflow YML
+
+The Action must be run `on:push:tags` triggers to keep the labels up-to-date and run the fast-forward on command. 
+
+```yml
+name: Fast-Forward
+
+on: 
+  push:
+    tags:
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: APN-Pucky/branch-follow-tag@main
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SSH_PRIVATE_KEY: ${{ secrets.GH_SSH }}
+          branch: stable
+```
+
+## Examples
+
+* https://github.com/APN-Pucky/smpl_util