fix: normalize trailing newline in st_relate.rs

Author: mehakarora3010-dotcom

rust/sedona-functions/src/st_relate.rs

@@ -44,4 +44,4 @@ mod tests {
         let udf: ScalarUDF = st_relate_udf().into();
         assert_eq!(udf.name(), "st_relate");
     }
-}
+}