Update Quarkus to v3.21.3

Author: renovate[bot]

server-sent-events-sample/pom.xml

@@ -15,10 +15,10 @@
     <maven.compiler.source>17</maven.compiler.source>
     <maven.compiler.target>17</maven.compiler.target>
 
-    <quarkus-plugin.version>3.21.2</quarkus-plugin.version>
+    <quarkus-plugin.version>3.21.3</quarkus-plugin.version>
     <quarkus.platform.artifact-id>quarkus-universe-bom</quarkus.platform.artifact-id>
     <quarkus.platform.group-id>io.quarkus</quarkus.platform.group-id>
-    <quarkus.platform.version>3.21.2</quarkus.platform.version>
+    <quarkus.platform.version>3.21.3</quarkus.platform.version>
 
     <awaitility.version>4.2.2</awaitility.version>
   </properties>