build(deps): bump fmt-maven-plugin from 2.19 to 2.20

Bumps [fmt-maven-plugin](https://github.com/spotify/fmt-maven-plugin) from 2.19 to 2.20.
- [Release notes](https://github.com/spotify/fmt-maven-plugin/releases)
- [Commits](spotify/fmt-maven-plugin@2.19.0...fmt-maven-plugin-2.20)

---
updated-dependencies:
- dependency-name: com.spotify.fmt:fmt-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -897,7 +897,7 @@
                 <plugin>
                     <groupId>com.spotify.fmt</groupId>
                     <artifactId>fmt-maven-plugin</artifactId>
-                    <version>2.19</version>
+                    <version>2.20</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-resources-plugin</artifactId>