Pin actions/checkout action to b4ffde6

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
     container: golang:1.22-alpine
     steps:
     - name: checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
     - name: install prereqs
       run: apk add --no-cache --update build-base
     - name: build