Update actions/checkout action to v7 (#80)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/cargo.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: actions/setup-java@v5
         with:
           distribution: 'temurin'

.github/workflows/pdd.yml

@@ -11,5 +11,5 @@ jobs:
   pdd:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: volodya-lombrozo/pdd-action@master

.github/workflows/tarpaulin.yml

@@ -8,7 +8,7 @@ jobs:
   check:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable

.github/workflows/up.yml

@@ -10,7 +10,7 @@ jobs:
   up:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - run: |-
           git fetch --tags --force && \
           latest=$(git tag --sort=creatordate | tail -1) && \

.github/workflows/xcop.yml

@@ -11,5 +11,5 @@ jobs:
   xcop:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: g4s8/xcop-action@master