Bump the gradle group in /codegen with 2 updates

Bumps the gradle group in /codegen with 2 updates: [com.diffplug.spotless:spotless-plugin-gradle](https://github.com/diffplug/spotless) and [com.autonomousapps:dependency-analysis-gradle-plugin](https://github.com/autonomousapps/dependency-analysis-android-gradle-plugin).


Updates `com.diffplug.spotless:spotless-plugin-gradle` from 7.0.2 to 7.0.3
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@gradle/7.0.2...gradle/7.0.3)

Updates `com.autonomousapps:dependency-analysis-gradle-plugin` from 2.13.3 to 2.15.0
- [Changelog](https://github.com/autonomousapps/dependency-analysis-gradle-plugin/blob/main/CHANGELOG.md)
- [Commits](autonomousapps/dependency-analysis-gradle-plugin@v2.13.3...v2.15.0)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
  dependency-version: 7.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: com.autonomousapps:dependency-analysis-gradle-plugin
  dependency-version: 2.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

codegen/gradle/libs.versions.toml

@@ -3,9 +3,9 @@ junit5 = "5.12.1"
 smithy = "1.56.0"
 test-logger-plugin = "4.0.0"
 spotbugs = "6.0.22"
-spotless = "7.0.2"
+spotless = "7.0.3"
 smithy-gradle-plugins = "1.2.0"
-dep-analysis = "2.13.3"
+dep-analysis = "2.15.0"
 jsoup = "1.19.1"
 commonmark = "0.17.0"