revert : update OS ver as jobs are getting queued for very long

Signed-off-by: mohapatr3 <[email protected]>

Author: mohapatr3

.github/workflows/generator.yml

@@ -11,7 +11,7 @@ env:
 
 jobs:
   Build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install

.github/workflows/py.yml

@@ -11,7 +11,7 @@ env:
 
 jobs:
   Build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install