Bump actions/checkout from 6 to 7

Author: roji

.github/workflows/build.yml

@@ -52,7 +52,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Start PostgreSQL ${{ matrix.pg_major }} (Linux)
         id: setup-postgresql-linux
@@ -148,7 +148,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v5
@@ -184,7 +184,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v5