Coding Standards: Update the config for `WordPress.PHP.NoSilencedErro…

…rs` in PHPCS ruleset.

Follow-up to [45611].

Props jrf, hellofromTonya.
See #53359.

git-svn-id: https://develop.svn.wordpress.org/trunk@51658 602fd350-edb4-49c9-b593-d223f7449a82

phpcs.xml.dist

@@ -286,6 +286,7 @@
 				<element value="gzinflate"/>
 				<element value="gzuncompress"/>
 				<element value="gzdecode"/>
+				<element value="imagecreatefromwebp"/>
 			</property>
 		</properties>
 	</rule>