Bump picocli from 4.5.0 to 4.7.4 in /migrator (#3039)

Bumps [picocli](https://github.com/remkop/picocli) from 4.5.0 to 4.7.4.
- [Release notes](https://github.com/remkop/picocli/releases)
- [Changelog](https://github.com/remkop/picocli/blob/main/RELEASE-NOTES.md)
- [Commits](https://github.com/remkop/picocli/compare/v4.5.0...v4.7.4)

---
updated-dependencies:
- dependency-name: info.picocli:picocli
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

migrator/pom.xml

@@ -66,7 +66,7 @@
         <dependency>
             <groupId>info.picocli</groupId>
             <artifactId>picocli</artifactId>
-            <version>4.5.0</version>
+            <version>4.7.4</version>
         </dependency>
         <dependency>
             <groupId>com.google.truth.extensions</groupId>