Update setup-dotnet Github action

skip-release-and-release-note: true
GitOrigin-RevId: fa9909f352e11f41eeb2b7c0d9bbd10371811f58

Author: Octobob

.github/workflows/main.yaml

@@ -43,7 +43,7 @@ jobs:
           fetch-depth: 0 # all
 
       - name: Setup .NET 8.0
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
 
@@ -150,7 +150,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Setup .NET 8
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x