fix: upgraded net version in actions

Author: miszu

.github/workflows/main.yml

@@ -6,7 +6,7 @@ on:
 env:
   AZURE_FUNCTIONAPP_NAME: mediumfunctionapp                               # your application's name in Azure
   AZURE_FUNCTIONAPP_PACKAGE_PATH: '.'                                     # path to your web app project, defaults to the repository root
-  DOTNET_VERSION: '2.2.402'                                               # dotnet version to use
+  DOTNET_VERSION: '3.1.100'                                               # dotnet version to use
   NPM_TOKEN: ${{ secrets.NPM_TOKEN }}                                     # dotnet version to use
   SWAGGER_LINK: https://mediumfunctionapp.azurewebsites.net/api/swagger   # swagger document link (not UI)
   TYPES_FILENAME: index.d.ts                                              # file with types