chore(deps): update actions/checkout digest to b4ffde6

Author: renovate[bot]

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
   build-test:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@v3
         with:
           node-version: '16'
@@ -49,7 +49,7 @@ jobs:
     needs: [build-test]
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@v3
         with:
           node-version: '16'