try using dotnet-version: 8.0.x

Author: mythz

.github/workflows/build-container.yml

@@ -89,7 +89,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '8.0'
+          dotnet-version: 8.0.x
 
       - name: Build and push Docker image
         run: |

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup dotnet
         uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '8.*'
+          dotnet-version: 8.0.x
 
       - name: build
         run: dotnet build