[ANNOUNCE] Apache Solr 9.1.0 released

[Ishan Chattopadhyaya <is...@apache.org>]

The Solr PMC is pleased to announce the release of Apache Solr 9.1.0.

Solr is the popular, blazing fast, open source NoSQL search platform
from the Apache Solr project. Its major features include powerful
full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, rich document handling, and
geospatial search. Solr is highly scalable, providing fault tolerant
distributed search and indexing, and powers the search and navigation
features of many of the world's largest internet sites.

Solr 9.1.0 is available for immediate download at:

  <https://solr.apache.org/downloads.html>

### Solr 9.1.0 Release Highlights:

 * Dedicated query coordinator nodes in a Solr cluster
 * Improvements to admin UI: managing paramsets in queries, managing field
   types, replica types while collection creation, etc.
 * Support for rolling up core level metrics to be node level metrics

Please refer to the Upgrade Notes in the Solr Ref Guide for
information on upgrading from previous Solr versions:

  <https://solr.apache.org/guide/solr/9_1/upgrade-notes/solr-upgrade-notes.html>

Please read CHANGES.txt for a full list of new features, changes and bugfixes:

  <https://solr.apache.org/9_1_0/changes/Changes.html>