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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         php: ["8.1", "8.2"]
     steps:
       - name: 📦 Check out the codebase
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
         with:
           fetch-depth: 0
 

.github/workflows/shellcheck.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: 📦 Check out the codebase
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
         with:
           fetch-depth: 0