Fix inconsistent argument

lib/PBot/Plugin/RemindMe.pm

@@ -473,7 +473,7 @@ sub add_reminder($self, %args) {
 }
 
 # delete a reminder by its id, from SQLite and the PBot event queue
-sub delete_reminder($self, $id, $dont_dequeue) {
+sub delete_reminder($self, $id, $dont_dequeue = 0) {
     return if not $self->{dbh};
 
     # remove from SQLite database

lib/PBot/VERSION.pm

@@ -25,7 +25,7 @@ use PBot::Imports;
 # These are set by the /misc/update_version script
 use constant {
     BUILD_NAME     => "PBot",
-    BUILD_REVISION => 4650,
+    BUILD_REVISION => 4651,
     BUILD_DATE     => "2023-04-17",
 };