Clarify what Convert does

Author: urschrei

geo/src/lib.rs

@@ -152,8 +152,8 @@
 //!
 //! ## Conversion
 //!
-//! - **[`Convert`]**: Convert (infalliby) the type of a geometry’s coordinate value
-//! - **[`TryConvert`]**: Convert (falliby) the type of a geometry’s coordinate value
+//! - **[`Convert`]**: Convert (infalliby) the numeric type of a geometry’s coordinate value
+//! - **[`TryConvert`]**: Convert (falliby) the numeric type of a geometry’s coordinate value
 //! - **[`ToDegrees`]**: Radians to degrees coordinate transforms for a given geometry.
 //! - **[`ToRadians`]**: Degrees to radians coordinate transforms for a given geometry.
 //!