Bump com.ibm.icu:icu4j from 67.1 to 73.2 in /metadata (#3092)

Bumps [com.ibm.icu:icu4j](https://github.com/unicode-org/icu) from 67.1 to 73.2.
- [Release notes](https://github.com/unicode-org/icu/releases)
- [Commits](https://github.com/unicode-org/icu/commits)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mandlil <138015259+mandlil@users.noreply.github.com>

metadata/pom.xml

@@ -101,7 +101,7 @@
     <dependency>
       <groupId>com.ibm.icu</groupId>
       <artifactId>icu4j</artifactId>
-      <version>67.1</version>
+      <version>73.2</version>
     </dependency>
 
     <!-- https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java -->