github: Upgrade from ubuntu-20.04 to ubuntu-latest (#238)

Author: bkeryan

.github/workflows/Notify-Convention-Change.yml

@@ -12,7 +12,7 @@ jobs:
   org-check:
     name: Check GitHub Organization
     if: github.repository_owner == 'ni'
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Noop
         run: "true"

.github/workflows/Update-Poetry-Lock.yml

@@ -14,7 +14,7 @@ jobs:
   org-check:
     name: Check GitHub Organization
     if: github.repository_owner == 'ni'
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Noop
         run: "true"