Update actions/checkout action to v4.2.2

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository.
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           submodules: true
       - name: Setup nix.
@@ -40,7 +40,7 @@ jobs:
         llvm_version: [15, 16, 17, 18, 19]
     steps:
       - name: Checkout repository.
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           submodules: true
       - name: Setup go.
@@ -72,7 +72,7 @@ jobs:
       - pre-commit
     steps:
       - name: Checkout repository.
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           submodules: true
       - name: Update apt cache.
@@ -103,7 +103,7 @@ jobs:
       - pre-commit
     steps:
       - name: Checkout repository.
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           submodules: true
       - name: Setup nix.
@@ -127,7 +127,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout repository.
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           submodules: true
       - name: Setup go.