Add govulncheck cron

Add `govulncheck` cron configuration.

Signed-off-by: Pranshu Srivastava <rexagod@gmail.com>

.github/workflows/cron.yml

@@ -0,0 +1,26 @@
+name: cron
+
+on:
+  schedule:
+    # Run every Monday
+    - cron: '0 0 * * 1'
+
+env:
+  GO_VERSION: "^1.19"
+
+jobs:
+  ci-security-checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        name: Checkout code
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ env.GO_VERSION }}
+      - name: Install govulncheck binary
+        run: |
+          go install golang.org/x/vuln/cmd/govulncheck@latest
+      - name: Run security checks
+        run: |
+          govulncheck -v ./...