Add repository to Cargo.toml

Cargo.toml

@@ -7,6 +7,7 @@ license = "MIT"
 readme = "README.md"
 keywords = ["ham-radio", "amateur-radio", "qso", "log-book", "logbook"]
 categories = ["command-line-utilities"]
+repository = "https://gitlab.scd31.com/stephen/limalogger"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html