Update `Bengali` translation

Currently translated at 84.0% (517 of 615 strings)

Translation: Wiki-Bot/Discord
Translate-URL: https://translate.wikibot.de/projects/wiki-bot/discord/bn/

i18n/bn.json

@@ -1,6 +1,6 @@
 {
     "__translator": [
-        "ThisIsACreeper0101",
+        "Saurmandal",
         "R4356th",
         " ",
         " ",