Bump actions/checkout from 6 to 7 (#161)

Author: dependabot[bot]

.github/workflows/build-linux.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install dependencies
         run: |

.github/workflows/build-macos.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Cache Homebrew downloads
         uses: actions/cache@v5

.github/workflows/build-windows.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up MSYS2
         uses: msys2/setup-msys2@v2