Bump com.ibm.icu:icu4j from 77.1 to 78.1

Bumps [com.ibm.icu:icu4j](https://github.com/unicode-org/icu) from 77.1 to 78.1.
- [Release notes](https://github.com/unicode-org/icu/releases)
- [Commits](https://github.com/unicode-org/icu/commits/release-78.1)

---
updated-dependencies:
- dependency-name: com.ibm.icu:icu4j
  dependency-version: '78.1'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -52,7 +52,7 @@
         <assertj.version>3.27.6</assertj.version>
         <evalex.version>3.5.0</evalex.version>
         <github-slugify.version>3.0.7</github-slugify.version>
-        <icu4j.version>77.1</icu4j.version>        <!-- Optional dependency of Slugify -->
+        <icu4j.version>78.1</icu4j.version>        <!-- Optional dependency of Slugify -->
         <jsonschema-generator.version>4.38.0</jsonschema-generator.version>
         <hebi-sass.version>1.0.4</hebi-sass.version>
         <quarkus.package.jar.enabled>true</quarkus.package.jar.enabled>