chore: added workflow concurrency

.github/workflows/release.yml

@@ -1,3 +1,9 @@
+name: Create Release
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 on:
   workflow_dispatch:
   push:
@@ -13,8 +19,6 @@ permissions:
   pages: write
   id-token: write
 
-name: Create Release
-
 env:
   APP_NAME: pyTermTk
 

.github/workflows/testing.yml

@@ -1,8 +1,9 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
 name: Testing
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 on:
   push:
     branches: [ main ]