Back to use ubuntu-20.04

Signed-off-by: Toomore Chiang <[email protected]>

Author: toomore

.github/workflows/build_docs.yml

@@ -14,7 +14,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/build_image.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   docker-dev:
-    runs-on: ['ubuntu-20.04', 'ubuntu-22.04']
+    runs-on: ['ubuntu-20.04']
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/docker-compose.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   docker:
-    runs-on: ['ubuntu-20.04', 'ubuntu-22.04']
+    runs-on: ['ubuntu-20.04']
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/pytest.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   run_test:
-    runs-on: ['ubuntu-20.04', 'ubuntu-22.04']
+    runs-on: ['ubuntu-20.04']
     strategy:
       matrix:
         python-version: ['3.10']