Upgrade actions/setup-dotnet to v4

.github/actions/test/action.yml

@@ -27,7 +27,7 @@ runs:
   using: 'composite'
   steps:
     - name: Setup .NET
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v4
 
     - name: Setup Postgres
       if: ${{ inputs.use_postgres }}

.github/workflows/api_docs.yml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup dotnet
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         id: setup-dotnet
 
       - name: Create openapi.json

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup .NET
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v4
 
     - name: Setup Environment Variables
       id: variables