L10N patch.

Author: Maikuolan

Changelog.md

@@ -151,3 +151,5 @@ __*Why "v3.0.0" instead of "v1.0.0?"*__ Prior to phpMussel v3, the "phpMussel Co
 [2023.03.24; New Feature; Maikuolan]: Added the ability to log outbound requests.
 
 [2023.04.01; Maikuolan]: Reworked the loadL10N method, how it handles HTTP_ACCEPT_LANGUAGE, improved rule assignment, added some assumptions for supported L10N, and added the ability to defer non-supported L10N to supported L10N where sufficiently similar to be acceptable.
+
+[2023.05.06~21; Maikuolan]: Added L10N for Bulgarian.