Bump nima.version from 4.0.0-RC1 to 4.0.0-RC2

Bumps `nima.version` from 4.0.0-RC1 to 4.0.0-RC2.

Updates `io.helidon.webserver:helidon-webserver` from 4.0.0-RC1 to 4.0.0-RC2

Updates `io.helidon.http.media:helidon-http-media-jsonb` from 4.0.0-RC1 to 4.0.0-RC2

---
updated-dependencies:
- dependency-name: io.helidon.webserver:helidon-webserver
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.helidon.http.media:helidon-http-media-jsonb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

tests/pom.xml

@@ -17,7 +17,7 @@
     <jackson.version>2.15.3</jackson.version>
     <jex.version>2.5</jex.version>
     <avaje-inject.version>9.8</avaje-inject.version>
-    <nima.version>4.0.0-RC1</nima.version>
+    <nima.version>4.0.0-RC2</nima.version>
   </properties>
 
   <modules>