fix: update workflow to use ubuntu-22.04 for consistency

Author: noraeb

.github/workflows/test-on-pr-branch.yml

@@ -3,7 +3,7 @@ on: pull_request
 
 jobs:
   unit:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -22,7 +22,7 @@ jobs:
       - name: Run unit tests
         run: npm run-script test:unit
   visual:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -52,4 +52,4 @@ jobs:
           name: failed_screenshots
           path: |
             screenshots/*/failed/
-            screenshots/*/baseline/
+            screenshots/*/baseline/

.github/workflows/test.yml

@@ -3,7 +3,7 @@ on: [push, workflow_dispatch]
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.github/workflows/update-screenshots.yml

@@ -4,7 +4,7 @@ on: workflow_dispatch
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3