Fix whitespace

Author: mbj

sqlx-postgres/src/options/doc.md

@@ -182,4 +182,4 @@ let pool = PgPool::connect_with(opts).await?;
 [libpq-params]: https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS
 [libpq-envars]: https://www.postgresql.org/docs/current/libpq-envars.html
 [rfc7468]: https://datatracker.ietf.org/doc/html/rfc7468
-[`webpki-roots`]: https://docs.rs/webpki-roots
+[`webpki-roots`]: https://docs.rs/webpki-roots