fix(ci): update restore path to src solution

Author: CalvinAllen

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
           dotnet-version: 8.0.x
 
       - name: Restore dependencies
-        run: dotnet restore
+        run: dotnet restore src/CodingWithCalvin.VsixSdk.slnx
 
       - name: Build SDK
         run: dotnet build src/CodingWithCalvin.VsixSdk/CodingWithCalvin.VsixSdk.csproj -c Release --no-restore