Bump pipeline ubuntu version

Author: devrnt

.github/workflows/deploy.yml

@@ -5,7 +5,7 @@ on:
       - main
 jobs:
   deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
 

.github/workflows/main.yml

@@ -2,13 +2,12 @@ name: CI
 on: [push, pull_request]
 jobs:
   build:
-    name: Build, lint, and test on Node ${{ matrix.node }} and ${{ matrix.os }}
+    name: Build, lint, and test on Node ${{ matrix.node }}
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         node: ['16.x', '18.x']
-        os: [ubuntu-20.04]
 
     steps:
       - name: Checkout repo

.github/workflows/size.yml

@@ -2,7 +2,7 @@ name: Size
 on: [pull_request]
 jobs:
   size:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     env:
       CI_JOB_NUMBER: 1
     steps: