chore(deps): update actions/setup-dotnet action to v5

Author: renovate[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v5
         with:
           dotnet-version: '9.0.x'
       - run: ./build.cmd Test

.github/workflows/deploy-docs.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: '9.0.x'