chore: update node version in versioning cb step (#1712)

Author: josecorella

Diff for: codebuild/release/version.yml

@@ -12,13 +12,13 @@ env:
 phases:
   install:
     commands:
+      - n 18
+      - node -v
       - npm install --save-dev semantic-release
       - npm install @semantic-release/changelog -d
       - npm install @semantic-release/exec -d
       - npm install @semantic-release/git -d
       - npm install --save conventional-changelog
-    runtime-versions:
-      nodejs: 14
   pre_build:
     commands:
       - git config --global user.name "aws-crypto-tools-ci-bot"