SEC-1653: fix missing-govulncheck-workflow (#2313)

Author: picatz

.github/workflows/govulncheck.yml

@@ -0,0 +1,16 @@
+name: Govulncheck
+on:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  govulncheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6
+        with:
+          go-version-file: go.mod
+      - uses: temporalio/public-actions/golang/govulncheck@main