chore: remove incorrect categories

Author: piprett

Cargo.toml

@@ -10,7 +10,7 @@ documentation = "https://github.com/Erb3/markdown-builder"
 authors = ["Erb3 <49862976+Erb3@users.noreply.github.com>"]
 edition = "2021"
 keywords = ["markdown", "builder", "documentation"]
-categories = ["template-engine", "data-structures", "encoding"]
+categories = ["template-engine"]
 
 [dependencies]
 dyn-clonable = "0.9.0"