Allow workflow to be triggered manually

.github/workflows/pipeline.yml

@@ -5,6 +5,7 @@ on:
     branches:
     - main
   pull_request:
+  workflow_dispatch:
 
 concurrency: 'sandbox'
 

README.md

@@ -1,3 +1,5 @@
+[![CI/CD Pipeline](https://github.com/communitiesuk/mhclg-data-collection-beta/actions/workflows/pipeline.yml/badge.svg?branch=main&event=push)](https://github.com/communitiesuk/mhclg-data-collection-beta/actions/workflows/pipeline.yml)
+
 # Data Collection App
 This is the codebase for the Ruby/Rails app that will handle the submission of Lettings and Sales of Social Housing in England data.