Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
     name: Nim ${{ matrix.os }} ${{ matrix.nim }} ${{ matrix.gc }} test
     steps:
       - name: Setup Nim Enviroment
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - uses: jiro4989/setup-nim-action@v2
         with:
@@ -61,7 +61,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/master'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: "Setup nim"
         uses: jiro4989/setup-nim-action@v2

.github/workflows/performance.yml

@@ -12,7 +12,7 @@ jobs:
     name: Benchmark performance
     steps:
       - name: Setup Nim Enviroment
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0