Bump org.jruby:jruby-complete from 9.3.15.0 to 9.4.0.0

Bumps org.jruby:jruby-complete from 9.3.15.0 to 9.4.0.0.

---
updated-dependencies:
- dependency-name: org.jruby:jruby-complete
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

spec/pom.xml

diff --git a/spec/pom.xml b/spec/pom.xml
index 282b37f..23ae8c0 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -84,7 +84,7 @@
         <maven.site.skip>true</maven.site.skip>
         <asciidoctorj.version>3.0.0</asciidoctorj.version>
         <asciidoctorj.pdf.version>2.3.18</asciidoctorj.pdf.version>
-        <jruby.version>9.3.15.0</jruby.version>
+        <jruby.version>9.4.0.0</jruby.version>
         <!-- status: DRAFT, BETA, etc., or blank for final -->
         <status>DRAFT</status>
         <maven.build.timestamp.format>MMMM dd, yyyy</maven.build.timestamp.format>