minor #21527 Fix link reference being incorrect (Max Baldanza)

This PR was merged into the 7.4 branch.

Discussion
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 Fix link reference being incorrect

This causes the build to fail

Commits
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e5654c6 Fix link reference being incorrect

Author: javiereguiluz

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