Fixed License in Toml

Author: RPG-Alex

Cargo.toml

@@ -4,7 +4,7 @@ version = "1.0.0"
 edition = "2024"
 description = "A crate for parsing comments from sql files and using them for documentation generation"
 documentation = "https://docs.rs/sql_docs"
-license-file = "LICENSE"
+license = "GPL-3.0"
 repository = "https://github.com/rpg-alex/sql-docs"
 readme = "README.md"
 keywords = ["sql", "documentation", "parser", "schema", "codegen"]