Bump io.smallrye:smallrye-open-api-maven-plugin in /keycloak-theme (#2143)

Bumps io.smallrye:smallrye-open-api-maven-plugin from 4.0.2 to 4.0.3.

---
updated-dependencies:
- dependency-name: io.smallrye:smallrye-open-api-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

keycloak-theme/pom.xml

@@ -244,7 +244,7 @@
             <plugin>
                 <artifactId>smallrye-open-api-maven-plugin</artifactId>
                 <groupId>io.smallrye</groupId>
-                <version>4.0.2</version>
+                <version>4.0.3</version>
                 <configuration>
                     <scanPackages>org.keycloak.admin.ui.rest</scanPackages>
                 </configuration>