Updating workflows

Author: diemol

.github/workflows/linter.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   linter:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
         uses: actions/checkout@v2

.github/workflows/publish-site.yml

@@ -10,7 +10,7 @@ env:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
         uses: actions/checkout@v2