Update CodeQL to use .NET 6

Author: alexeyzimarev

.github/workflows/codeql-analysis.yml

@@ -13,31 +13,37 @@ jobs:
     runs-on: windows-latest
     steps:
       # Due to the insufficient memory allocated by default, CodeQL sometimes requires more to be manually allocated
-      - name: Configure Pagefile
+      -
+        name: Configure Pagefile
         id: config_pagefile
         uses: al-cheb/[email protected]
         with:
             minimum-size: 8GB
             maximum-size: 32GB
             disk-root: "D:"
-
-      - name: Checkout repository
+      -
+        name: Checkout repository
         id: checkout_repo
         uses: actions/[email protected]
-
-      - name: Initialize CodeQL
+      -
+        name: Setup .NET
+        uses: actions/[email protected]
+        with:
+          dotnet-version: '6.0'
+      -
+        name: Initialize CodeQL
         id: init_codeql
         uses: github/codeql-action/init@v1
         with:
           queries: security-and-quality
-
-      - name: Build project
+      -  
+        name: Build project
         id: build_project
         shell: pwsh
         run: |
           dotnet build ./src/RestSharp/RestSharp.csproj -c Release
-
-      - name: Perform CodeQL Analysis
+      -  
+        name: Perform CodeQL Analysis
         id: analyze_codeql
         uses: github/codeql-action/analyze@v1