updated example workflows

.github/workflows/03-reusable-workflow.yml

@@ -0,0 +1,18 @@
+name: Reusable workflow example
+
+on:
+  workflow_call:
+    inputs:
+      username:
+        required: true
+        type: string
+
+jobs:
+  example_job:
+    runs-on: ubuntu-latest
+    name: Pass input to my-action
+    steps:
+      - name: Run a one-line script
+        run: echo Hello from reuseable workflow, ${{ inputs.username }}
+
+