remove fail_ci_if_error: false to surface upload failures

Per review feedback on guacsec/trustify#2376 — keep CI failing on
Codecov upload errors so broken coverage is caught immediately.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ptomanRH

.github/workflows/pr.yml

@@ -75,4 +75,3 @@ jobs:
         flags: unit-tests
         files: ./target/site/jacoco/jacoco.xml
         slug: guacsec/trustify-da-java-client
-        fail_ci_if_error: false