Add CI to check if golang version updated

Signed-off-by: Todd Short <[email protected]>

Author: tmshort

.github/workflows/go-verdiff.yaml

@@ -0,0 +1,24 @@
+name: go-verdiff
+on:
+  pull_request:
+    paths:
+    - go.mod
+    branches:
+    - main
+jobs:
+  go-verdiff:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Check golang version
+      run: |
+        old=$(git grep -ohP '^go .*$' ${{ github.event.pull_request.base.sha }} -- go.mod)
+        new=$(git grep -ohP '^go .*$' go.mod)
+        if [ "${new}" != "${old}" ]; then
+          echo "New version of golang found: \"${new}\" vs \"${old}\""
+          exit 1
+        else
+          echo "No golang version change detected"
+        fi