Cancel previous deploy workflow when start new one

Author: ianthomas23

.github/workflows/deploy-wasm.yml

@@ -7,6 +7,10 @@ on:
       - main
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest