pgAdmin 4 commit: Fix syntax error when changing the event type for the

Fix syntax error when changing the event type for the existing rule. It is a regression of #5115.
Fixes #5215

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=fd07e0c868cd12186671a088b2ca7f1479141c40
Author: Aditya Toshniwal <aditya(dot)toshniwal(at)enterprisedb(dot)com>

Modified Files
--------------
docs/en_US/release_notes_4_19.rst | 3 +-
.../default/alter_insert_event_rule_nothing.sql | 10 +++++++
.../alter_insert_event_rule_nothing_msql.sql | 4 +++
.../alter_insert_event_rule_nothing_update.sql | 10 +++++++
...alter_insert_event_rule_nothing_update_msql.sql | 4 +++
.../schemas/tables/rules/tests/default/test.json | 32 ++++++++++++++++++----
.../schemas/tables/templates/rules/sql/update.sql | 15 +++++-----
7 files changed, 65 insertions(+), 13 deletions(-)