Bump solr-solrj from 8.8.2 to 8.9.0 in /examples

Bumps solr-solrj from 8.8.2 to 8.9.0.

---
updated-dependencies:
- dependency-name: org.apache.solr:solr-solrj
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/solr-container/build.gradle

@@ -10,7 +10,7 @@ dependencies {
     compileOnly "org.projectlombok:lombok:1.18.20"
     annotationProcessor "org.projectlombok:lombok:1.18.16"
 
-    implementation 'org.apache.solr:solr-solrj:8.8.2'
+    implementation 'org.apache.solr:solr-solrj:8.9.0'
 
     testImplementation 'org.testcontainers:testcontainers'
     testImplementation 'org.testcontainers:solr'