update ubuntu runner

Author: akshith-gunasheelan

.github/workflows/createtagandrelease.yml

@@ -5,7 +5,7 @@ on:
     types: [closed]
 jobs:
   create-tag:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     permissions:
       contents: write
     if: github.event.pull_request.merged && startsWith(github.head_ref, 'PR') && startsWith(github.base_ref, 'master')

.github/workflows/dockerimage.yml

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

.github/workflows/run_tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         python_version: [3.9]
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v2