Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/codecov.yaml

@@ -9,7 +9,7 @@ jobs:
   codecov:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'

.github/workflows/mvn.yaml

@@ -16,7 +16,7 @@ jobs:
         java: [11, 17]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'

.github/workflows/pdd.yaml

@@ -6,5 +6,5 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - uses: g4s8/pdd-action@master

.github/workflows/xcop.yaml

@@ -11,5 +11,5 @@ jobs:
   xcop:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
       - uses: g4s8/xcop-action@master