fix(curriculum): remove stray period (freeCodeCamp#58585)

Author: Supravisor

curriculum/challenges/english/21-a2-english-for-developers/learn-how-to-talk-about-hobbies-and-interests/657fbd591461eaeba07ffff1.md

@@ -9,7 +9,7 @@ dashedName: task-74
 
 # --description--
 
-The expression `There's a` +. name of an event + period of time is often used to inform someone about an upcoming event.
+The expression `There's a` + name of an event + period of time is often used to inform someone about an upcoming event.
 
 In the dialogue, the expression `There's a big convention next month` is used to convey information about a significant upcoming event related to sci-fi.