Update GitHub Actions runtimes

Author: EdmondLu

.github/workflows/ci.yml

@@ -12,8 +12,8 @@ jobs:
   test:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
       - run: dotnet restore SqlServerMcp.sln

.github/workflows/release.yml

@@ -12,8 +12,8 @@ jobs:
   release:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
       - run: dotnet test SqlServerMcp.sln --nologo