fix spring upperbound version

Signed-off-by: Olivier Lamy <olamy@apache.org>
diff --git a/pom.xml b/pom.xml
index af21765..2c67c72 100644
--- a/pom.xml
+++ b/pom.xml
@@ -96,7 +96,7 @@
     <slf4j.version>1.7.32</slf4j.version>
     <log4j.version>2.17.1</log4j.version>
     <ehcache.version>3.9.9</ehcache.version>
-    <spring.version>5.3.21</spring.version>
+    <spring.version>5.3.22</spring.version>
     <cxf.version>3.3.11</cxf.version>
     <jackson.version>2.12.1</jackson.version>
     <hsqldb.version>2.5.0</hsqldb.version>