Chore: add fetch-depth to examples

I don't think this is necessary in the normal case (checkout without any arguments), but it *is* necessary when checking out tags. So might as well always include it.

Author: rwos

README.md

@@ -53,6 +53,8 @@ jobs:
       YOUR_APPLICATION_NAME: cool-app
     steps:
       - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
       - name: create public/private key on GHA
         run: |
           mkdir -p ~/.ssh/
@@ -88,6 +90,8 @@ jobs:
       SSH_AUTH_SOCK: /tmp/ssh_agent.sock
     steps:
       - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
       - name: create an ssh key just for this run
         run: |
           mkdir -p ~/.ssh/