mainfest: Do not exclude linked document

Because the CONTRIBUTING.md is linked to from within the README.md,
which is shipped to users, it should itself also be shipped to users
to ensure an offline copy of the package is complete enough to read
all documentation.

Author: tingerrr

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Changed
 - Added alt text to `README.md`
+- Added `CONTRIBUTING.md` to package distribution
 
 ## Fixed
 

typst.toml

@@ -9,4 +9,4 @@ description = "Query and display headings in your documents and templates."
 categories = ["components", "scripting"]
 keywords = ["context", "chapter", "section", "heading"]
 license = "MIT"
-exclude = ["assets", "docs", "tests", "CONTRIBUTING.md", "Justfile"]
+exclude = ["assets", "docs", "tests", "Justfile"]