Updated Edge and PR Build Rules (#11)

Author: Zozman

.github/workflows/edge.yaml

@@ -2,6 +2,9 @@
 # This workflow builds and pushes the edge image for the Stream Webpage Container on merge to the main branch.
 name: Edge Image Build
 
+concurrency:
+  group: edge-build
+
 on:
   push:
     branches:

.github/workflows/pr.yaml

@@ -4,6 +4,10 @@ on:
   pull_request:
     branches: [ main ]
 
+concurrency:
+  group: pr-validation-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
 jobs:
   test:
     name: Run Tests