update pekko-persistence-mongodb to latest bugfix

Author: thjaeckle

bom/pom.xml

@@ -47,7 +47,7 @@
 
         <pekko-bom.version>1.0.1</pekko-bom.version>
         <pekko-http-bom.version>1.0.0</pekko-http-bom.version>
-        <pekko-persistence-mongodb.version>1.2.0</pekko-persistence-mongodb.version>
+        <pekko-persistence-mongodb.version>1.2.1</pekko-persistence-mongodb.version>
         <pekko-persistence-inmemory.version>1.0.0</pekko-persistence-inmemory.version>
         <pekko-management.version>1.0.0</pekko-management.version>
         <pekko-connector-kafka.version>1.0.0</pekko-connector-kafka.version>