Update github action workflows to use .NET7 SDK

Author: Warren Buckley

.github/workflows/ci.yml

@@ -23,9 +23,9 @@ jobs:
         run: 'dir env:'
 
       - name: Setup .NET Core
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: '6.0.x'
+          dotnet-version: '7.0.x'
 
       - name: Run .NET test
         run: dotnet test

.github/workflows/codeql-analysis.yml

@@ -28,9 +28,9 @@ jobs:
       if: ${{ github.event_name == 'pull_request' }}
 
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '6.0.x'
+        dotnet-version: '7.0.x'
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/intellicode.yml

@@ -15,9 +15,9 @@ jobs:
         fetch-depth: 0 # We need to fetch the entire Git history in order to verify the authenticity.
 
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '6.0.x' 
+        dotnet-version: '7.0.x' 
     - name: Build with dotnet
       working-directory: LogViewer.Server
       run: dotnet build # Project needs to build before training a model.

.github/workflows/richcodenav.yml

@@ -18,9 +18,9 @@ jobs:
 
     # **** Please change 'dotnet-version' to be the version of the .NET SDK used in your project **** #
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '6.0.x'
+        dotnet-version: '7.0.x'
 
     # **** Please change 'working-directory' to be the location where your .SLN file is located **** #
     - name: Install dependencies