fix: add missing docs link (#503)

Updated documentation URL for the project.

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Author: LeoBorai

Cargo.toml

@@ -11,7 +11,7 @@ resolver = "1"
 authors = ["Leo Borai <[email protected]>"]
 categories = ["web-programming", "web-programming::http-server"]
 description = "Simple and configurable command-line HTTP server"
-documentation = ""
+documentation = "https://http-server-rs.github.io"
 edition = "2024"
 include = ["/ui", "/src/"]
 keywords = ["configurable", "http", "server", "serve", "static"]