message: chore: improve commit convention examples to be more Vue-specific
diff: #### Examples
  -Appears under "Features" header, pencil subheader:
  +Appears under "Features" header, `compiler` subheader:
  ```
  -feat(pencil): add 'graphiteWidth' option
  +feat(compiler): add 'comments' option
  ```
  -Appears under "Bug Fixes" header, graphite subheader, with a link to issue #28:
  +Appears under "Bug Fixes" header, `v-model` subheader, with a link to issue #28:
  ```
  -fix(graphite): stop graphite breaking when width < 0.1
  +fix(v-model): handle events on blur
  close #28
  ```
  @@ -21,15 +21,15 @@ close #28
  Appears under "Performance Improvements" header, and under "Breaking Changes" with the breaking change explanation:
  ```
  -perf(pencil): remove graphiteWidth option
  +perf(core): improve vdom diffing by removing 'foo' option
  -BREAKING CHANGE: The graphiteWidth option has been removed. The default graphite width of 10mm is always used for performance reason.
  +BREAKING CHANGE: The 'foo' option has been removed.
  ```
  The following commit and commit `667ecc1` do not appear in the changelog if they are under the same release. If not, the revert commit appears under the "Reverts" header.
  ```
  -revert: feat(pencil): add 'graphiteWidth' option
  +revert: feat(compiler): add 'comments' option
  This reverts commit 667ecc1654a317a13331b17617d973392f415f02.
  ```
  