Bump xercesImpl in /testing/itest/bpel/helloworld-reference

Bumps xercesImpl from 2.8.0 to 2.12.2.

---
updated-dependencies:
- dependency-name: xerces:xercesImpl
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
1 file changed