CLDR-19186 Update version number for modifications (#5333)

Author: AEApple

docs/ldml/tr35-modifications.md

@@ -32,7 +32,7 @@ This is a partial document, describing only the changes to the LDML since the pr
       Note: As of CLDR-18209, ALL changes to the spec require this file, tr35-modifications.md to be modified as well. If you are making a change that doesn't need to be noted, or is already noted, please simply add an HTML comment (such as this one) to the appropriate section.  The comment will not be visible to viewers of the HTML page.
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-**Changes in LDML Version 49 (Differences from Version 48.1)**
+**Changes in LDML Version 48.2 (Differences from Version 48.1)**
 
 * New section [Nested Bracket Replacement](tr35-general.html#Character_Nested_Bracket_Replacement)
 * [Locale Display Name Algorithm](tr35-general.html#locale_display_name_algorithm) updated to use the nested bracket replacement data and avoid nested parentheses by flattening `-t-` (transform) language names