Update solr docker image for ddev

.ddev/docker-compose.solr.yaml

@@ -3,7 +3,7 @@ version: '3.6'
 services:
   solr:
     container_name: ddev-${DDEV_SITENAME}-solr
-    image: typo3solr/ext-solr:10.0.1
+    image: typo3solr/ext-solr:11.0.3
     restart: "no"
     ports:
       - 8983
@@ -17,4 +17,9 @@ services:
       - "./solr:/opt/solr/server/solr"
   web:
     links:
-      - solr:$DDEV_HOSTNAME
+      - solr
+
+volumes:
+  # solr is a persistent Docker volume for this project's solr data
+  # the volume will be named ddev-<project>_solr
+  solr: