Update github workflows

Author: linkdotnet

.github/workflows/codeql.yml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 6.0.x
+          dotnet-version: 7.0.x
           include-prerelease: true
 
       - name: Initialize CodeQL

.github/workflows/dotnet.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 7.0.x
         include-prerelease: true
     - name: Restore dependencies
       run: dotnet restore