Merge pull request #3337 from nexB/remove-ubuntu18-from-ci

Update release script to remove ubuntu18

Author: AyanSinhaMahapatra

.github/workflows/scancode-release.yml

@@ -326,7 +326,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
         pyver: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps: