update-safer-cpp-expectations doesn't recognize ForwardDeclChecker and other recently added checkers

https://bugs.webkit.org/show_bug.cgi?id=290267

Reviewed by Chris Dumez.

Added the support for updating expectations for recently introduced RetainPtr checkers.

* Tools/Scripts/update-safer-cpp-expectations:

Canonical link: https://commits.webkit.org/292548@main

Author: rniwa

Tools/Scripts/update-safer-cpp-expectations

@@ -25,8 +25,8 @@ import os
 import argparse
 
 EXPECTATIONS_PATH = '../../Source/{project}/SaferCPPExpectations/{checker_type}Expectations'
-CHECKERS = ['MemoryUnsafeCastChecker', 'NoUncountedMemberChecker', 'NoUncheckedPtrMemberChecker', 'RefCntblBaseVirtualDtor',
-    'UncheckedCallArgsChecker', 'UncheckedLocalVarsChecker', 'UncountedCallArgsChecker', 'UncountedLambdaCapturesChecker', 'UncountedLocalVarsChecker']
+CHECKERS = ['ForwardDeclChecker', 'MemoryUnsafeCastChecker', 'NoUncountedMemberChecker', 'NoUncheckedPtrMemberChecker', 'NoUnretainedMemberChecker', 'RefCntblBaseVirtualDtor',
+    'UncheckedCallArgsChecker', 'UncheckedLocalVarsChecker', 'UncountedCallArgsChecker', 'UncountedLambdaCapturesChecker', 'UncountedLocalVarsChecker', 'UnretainedLocalVarsChecker']
 PROJECTS = ['JavaScriptCore', 'WebCore', 'WebDriver', 'WebGPU', 'WebInspectorUI', 'WebKit', 'WebKitLegacy', 'WTF']