doc: update readme

Author: anonrig

README.md

@@ -2,12 +2,38 @@
 
 This action adds a prefix to the default Code of Conduct template and applies the necessary templates.
 
-## Example usage
+If used with `gr2m/create-or-update-pull-request-action@v1` workflow automatically creates a pull
+request with the applied changes.
+
+- Opens a pull request if output file does not exist [(Example)](https://github.com/anonrig/patch-test/pull/1)
+- Opens a pull request if patch file is changed [(Example)](https://github.com/anonrig/patch-test/pull/7)
+
+## Example Workflow
 
 ```yaml
-uses: @anonrig/patch-my-code-of-conduct@v1
-with:
-  base_file_path: './base.md'
-  patch_file_path: './patch_file'
-  output_file_path: '../../CODE_OF_CONDUCT.md'
+on: [push]
+
+jobs:
+  main_job:
+    runs-on: ubuntu-latest
+    name: Test Action
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          persist-credentials: false
+      - name: Start Patch
+        uses: anonrig/[email protected]
+        with:
+          base_file_path: './base.md'
+          patch_file_path: './patch'
+          output_file_path: './CODE_OF_CONDUCT.md'
+      - uses: gr2m/create-or-update-pull-request-action@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          body: "Applied the patch to the base Code of Conduct."
+          branch: actions/patch-code-of-conduct  # Custom branch *just* for this Action.
+          commit-message: 'doc: update Code of Conduct'
+          title: 'doc: update Code of Conduct'
 ```