Update version variables for release 9.1.0
diff --git a/pelicanconf.py b/pelicanconf.py
index 3b64168..48cb8aa 100755
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -10,8 +10,8 @@
 SITEURL = ''
 CURRENTYEAR = date.today().year
 
-LUCENE_LATEST_RELEASE = '9.0.0'
-LUCENE_LATEST_RELEASE_DATE = datetime(2021, 12, 7)
+LUCENE_LATEST_RELEASE = '9.1.0'
+LUCENE_LATEST_RELEASE_DATE = datetime(2022, 03, 22)
 LUCENE_PREVIOUS_MAJOR_RELEASE = '8.11.1'
 
 # This string will be appended to all unversioned css and js resources to prevent caching surprises on edits.