Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ${{ matrix.job.runs-on }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: mitoma/sver-actions/setup@v2
         with:
@@ -81,7 +81,7 @@ jobs:
     runs-on: ${{ matrix.job.runs-on }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: mitoma/sver-actions/setup@v2
         with:
@@ -129,7 +129,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: mitoma/sver-actions/setup@v2