fixed workflows

Author: thib-s

.github/workflows/deploy-docs.yml

@@ -11,7 +11,7 @@ permissions:
 jobs:
 
   build-and-deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     steps:
       - name: "Checkout"

.github/workflows/linters.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   checks:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       max-parallel: 4
       matrix:

.github/workflows/python-publish.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python