Add example workflow

README.md

@@ -1,2 +1,26 @@
 # get_submodule_hash
 GitHub action to get the hash of a submodule
+
+## Example workflow
+
+```yaml
+name: Getting the hash of the corelib submodule
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Get submodule hash
+      id: get-submodule-hash
+      uses: 0xFEEDC0DE64/get_submodule_hash
+      with:
+        submodule: libs/corelib
+
+    - name: Print submodule hash
+      run: echo "hash of submodule is ${{ steps.get-submodule-hash.outputs.hash }}"
+```