ci: update from ubuntu-20.04 to ubuntu-22.04 in workflows

Author: consideRatio

.github/workflows/diff.yml

@@ -20,7 +20,7 @@ on:
 
 jobs:
   diff-rendered-templates:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
         with:

.github/workflows/test-docker-build.yaml

@@ -28,7 +28,7 @@ jobs:
   # - https://github.com/docker/build-push-action/blob/v2.3.0/docs/advanced/local-registry.md
   # - https://github.com/docker/build-push-action/blob/v2.3.0/docs/advanced/multi-platform.md
   build_images:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
         with:

.github/workflows/test.yml

@@ -28,7 +28,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
 
@@ -42,7 +42,7 @@ jobs:
   # in small things. Unfortunately there is no easy way to share steps between
   # jobs or have "template" jobs, so we use `if` conditions on steps
   tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 10
 
     permissions:
@@ -349,7 +349,7 @@ jobs:
         if: ${{ always() }}
 
   test-local:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 5
 
     permissions:

.github/workflows/watch-dependencies.yaml

@@ -19,7 +19,7 @@ jobs:
   update-image-dependencies:
     # Don't run this job on forks
     if: github.repository == 'jupyterhub/binderhub'
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false