CLDR-18857 Add specific location format removal to modifications (#4944)

Author: robertbastian

docs/ldml/tr35-modifications.md

@@ -59,6 +59,7 @@ The LDML specification is divided into the following parts:
 
 * In [Element dateTimeFormat](tr35-dates.md#dateTimeFormat), added a new type `relative` and updated the
 guidelines on how to use the different `dateTimeFormat` types.
+* In [Using Time Zone Names](tr35-dates.md#Using_Time_Zone_Names), the "specific location format" was removed
 
 Note that small changes such as typos and link fixes are not listed above.
 Modifications in previous versions are listed in those respective versions.