Add changelog entry for PR#3106

Author: solrbot

changelog/unreleased/PR#3106-update-org-eclipse-jdt-ecj.yml

@@ -0,0 +1,7 @@
+title: Update org.eclipse.jdt:ecj to v3.46.0
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#3106
+  url: https://github.com/apache/solr/pull/3106