Add Solr params into quotes

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: milanmajchrak

docker/docker-compose-rest.yml

@@ -174,7 +174,7 @@ services:
       cp -r /opt/solr/server/solr/configsets/search/* search
       precreate-core statistics /opt/solr/server/solr/configsets/statistics
       cp -r /opt/solr/server/solr/configsets/statistics/* statistics
-      exec solr -p 8983 -f -m ${SOLR_HEAP:-4g}
+      exec solr -p 8983 -f -m "${SOLR_HEAP:-4g}"
 volumes:
   # Commented out because there are a lot of files in the assetstore
   assetstore: