readme: Fix MD interpreting - as bullet point

readme.md

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 # Feely Pona (aka. Terry Cherry)
 
 This is the repository for the game Terry Cherry that was developed as part of
-an impromptu game-jam in September 2023 over 4 weekends to make a hero
-+ tower-defense mashup combination game. The game was developed in C++ using
+an impromptu game-jam in September 2023 over 4 weekends to make a hero cross
+x tower-defense mashup combination game. The game was developed in C++ using
 Raylib 4.5.0 as the base framework for the game.
 
 This game was developed with 3 people