smoke5: buf pinned 1.75.0

.gitea/workflows/smoke5.yml

@@ -0,0 +1,15 @@
+name: smoke5
+on: [push]
+jobs:
+  buf:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: bufbuild/buf-action@v1
+        with:
+          setup_only: true
+          version: "1.75.0"
+      - name: buf version
+        run: |
+          which buf || echo "no buf"
+          buf --version || echo "BUF_VERSION_FAILED"