chore(ci): Use ubuntu-latest - Ubuntu 20 is dead

Signed-off-by: Paul Horton <phorton@sonatype.com>

Author: madpah

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ env:
 jobs:
   coding-standards:
     name: Linting & CodingStandards
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -59,7 +59,7 @@ jobs:
 
   static-code-analysis:
     name: StaticCodingAnalysis (py${{ matrix.python-version}} ${{ matrix.toxenv-factor }})
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
@@ -99,7 +99,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['ubuntu-20.04', 'windows-latest', 'macos-latest']
+        os: ['ubuntu-latest', 'windows-latest', 'macos-latest']
         python-version:
           - "3.10" # highest supported
           - "3.9"
@@ -109,7 +109,7 @@ jobs:
         toxenv-factor: ['locked']
         include:
           - # test with the lowest dependencies
-            os: 'ubuntu-20.04'
+            os: 'ubuntu-latest'
             python-version: '3.6'
             toxenv: 'lowest'
     timeout-minutes: 30