docs: markdown link syntax

Author: calmh

README.md

@@ -4,8 +4,9 @@ The repository hosts the source for https://apt.syncthing.net/.
 
 ## License
 
-Text and images (`site/**`) licensed under the `Creative Commons Attribution
-4.0 International License <https://creativecommons.org/licenses/by/4.0/>`__.
+Text and images (`site/**`) licensed under the [Creative Commons Attribution
+4.0 International License](https://creativecommons.org/licenses/by/4.0/).
 
-Backend code licensed under `EUPL 1.2
-<https://interoperable-europe.ec.europa.eu/collection/eupl/eupl-text-eupl-12>`__ or later.
+Backend code licensed under [EUPL
+1.2](https://interoperable-europe.ec.europa.eu/collection/eupl/eupl-text-eupl-12)
+or later.