fix(deps): update vertx.version to v4.5.15 (#292)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -23,7 +23,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <vertx.version>4.5.14</vertx.version>
+    <vertx.version>4.5.15</vertx.version>
     <pac4j.version>5.7.7</pac4j.version>
     <java.version>11</java.version>
     <maven.compiler.plugin.version>3.14.0</maven.compiler.plugin.version>