Update dotnet.yml

Author: vertigra

.github/workflows/dotnet.yml

@@ -16,7 +16,7 @@ env:
   VERSION: 1.0.0
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   PROJECT_NAME: CheckingAvailability
-  PROJECT_PATH: src/${{ env.PROJECT_NAME }}
+  PROJECT_PATH: src/${{ PROJECT_NAME }}
 
 jobs:
   build: