ci: use ubuntu-latest runner in gha actions

Author: fdintino

.github/workflows/frontend.yml

@@ -4,7 +4,7 @@ on: [push]
 
 jobs:
   gulp:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version: [14.15.x]

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
           - python-version: 3.11
             requirements-file: django-3.1.txt
         os: [
-          ubuntu-20.04,
+          ubuntu-latest,
         ]
 
     steps:
@@ -50,7 +50,7 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
     - name: library prerequisites
-      run: sudo apt-get install python-dev libpq-dev libmagic1 gcc libxml2-dev libxslt1-dev libjpeg62 libopenjp2-7 -y
+      run: sudo apt-get install python-dev-is-python3 libpq-dev libmagic1 gcc libxml2-dev libxslt1-dev libjpeg62 libopenjp2-7 -y
     - name: Install extra dependencies
       run: pip install lxml
       if: matrix.python-version == '3.10'

.readthedocs.yaml

@@ -7,7 +7,7 @@ version: 2
 
 # Set the version of Python and other tools you might need
 build:
-  os: ubuntu-20.04
+  os: ubuntu-latest
   tools:
     python: "3.9"
     # You can also specify other tool versions: