Fix Jandex Maven coordinates (#2888)

The entry `jandex = { module = "io.smallrye.jandex:jandex", version ="3.5.0" }` is wrong (coordinates are `io.smallrye:jandex`), and Jandex is defined elsewhere as `smallrye-jandex`.
Interestingly, these (broken) coordinates seem to cause the consistent re-creation of the Quarkus 3.29.0 PR (the cause is a mystery).

Author: snazy

build-logic/src/main/kotlin/polaris-java.gradle.kts

@@ -48,7 +48,7 @@ plugins.withType<JandexPlugin>().configureEach {
     version =
       versionCatalogs
         .named("libs")
-        .findLibrary("jandex")
+        .findLibrary("smallrye-jandex")
         .orElseThrow { GradleException("jandex version not found in libs.versions.toml") }
         .get()
         .version

gradle/libs.versions.toml

@@ -73,7 +73,6 @@ jakarta-persistence-api = { module = "jakarta.persistence:jakarta.persistence-ap
 jakarta-servlet-api = { module = "jakarta.servlet:jakarta.servlet-api", version = "6.1.0" }
 jakarta-validation-api = { module = "jakarta.validation:jakarta.validation-api", version = "3.1.1" }
 jakarta-ws-rs-api = { module = "jakarta.ws.rs:jakarta.ws.rs-api", version = "4.0.0" }
-jandex = { module = "io.smallrye.jandex:jandex", version ="3.5.0" }
 javax-servlet-api = { module = "javax.servlet:javax.servlet-api", version = "4.0.1" }
 junit-bom = { module = "org.junit:junit-bom", version = "5.14.0" }
 keycloak-admin-client = { module = "org.keycloak:keycloak-admin-client", version = "26.0.7" }