Bump actions/checkout from 6 to 7

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Meson/Ninja
         if: matrix.build_system == 'meson'
@@ -95,7 +95,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Verify tag is on master
         run: |