chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         scala-version: [ 2.12.13, 2.13.8 ]
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.1.5
         with:
           fetch-depth: 100
       - name: Fetch tags

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         scala-version: [ 2.12.13, 2.13.8 ]
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.1.5
         with:
           fetch-depth: 100
       - name: Fetch tags