prevent parallel deployment collisions in documentation workflow (#5183)

* prevent parallel deployment collisions in documentation workflow

* ci: cache Playwright browsers and add concurrency to unit-tests

Author: diegoteran

.github/workflows/deploy-documentation.yml

@@ -5,6 +5,10 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: write
 

.github/workflows/unit-tests.yml

@@ -2,6 +2,10 @@ name: Unit tests
 
 on: pull_request
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   full_test_run:
 
@@ -18,6 +22,15 @@ jobs:
     - name: NPM install
       run: npm ci
 
+    - name: Cache Playwright browsers
+      uses: actions/cache@v4
+      id: playwright-cache
+      with:
+        path: ~/.cache/ms-playwright
+        key: ${{ runner.os }}-playwright-${{ hashFiles('package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-playwright-
+
     - name: Install playwright browsers
       run: npx playwright install --with-deps