Reintroduce Quarkus 3.15 compatibility

Author: gsmet

docs/modules/ROOT/pages/includes/attributes.adoc

@@ -1,4 +1,4 @@
-:quarkus-version: 3.17.0
+:quarkus-version: 3.15.2
 :quarkus-github-app-version: 2.8.0
 
 :github-api-javadoc-root-url: https://github-api.kohsuke.org/apidocs/org/kohsuke/github

pom.xml

@@ -21,7 +21,7 @@
         <maven.compiler.target>17</maven.compiler.target>
         <maven.compiler.release>17</maven.compiler.release>
         <maven.compiler.parameters>true</maven.compiler.parameters>
-        <quarkus.version>3.17.2</quarkus.version>
+        <quarkus.version>3.15.2</quarkus.version>
         <compiler-plugin.version>3.13.0</compiler-plugin.version>
         <resource-plugin.version>3.3.1</resource-plugin.version>
         <dependency-plugin.version>3.8.1</dependency-plugin.version>