Fix link reference being incorrect

This causes the build to fail

Author: Max Baldanza

reference/configuration/framework.rst

@@ -4160,5 +4160,5 @@ to know their differences.
 .. _`Link HTTP header`: https://tools.ietf.org/html/rfc5988
 .. _`SMTP session`: https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol#SMTP_transport_example
 .. _`PHP attributes`: https://www.php.net/manual/en/language.attributes.overview.php
-.. _`public cache`: https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Caching#shared_cache
+.. _`shared cache`: https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Caching#shared_cache
 .. _`private cache`: https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Caching#private_caches