Update quarkus.platform.version to v3.21.1

Author: renovate[bot]

pom.xml

@@ -12,7 +12,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>
     <quarkus.platform.group-id>io.quarkus.platform</quarkus.platform.group-id>
-    <quarkus.platform.version>3.17.8</quarkus.platform.version>
+    <quarkus.platform.version>3.21.1</quarkus.platform.version>
     <quarkus-operator-sdk.artifact-id>quarkus-operator-sdk-bom</quarkus-operator-sdk.artifact-id>
     <surefire-plugin.version>3.5.3</surefire-plugin.version>
   </properties>