Fix spec for Dynamic to disallow Metadata-Version (#1057)

* Fix spec for `Dynamic to disallow `Metadata-Version`

It accidentally listed `Version` which various tools already set dynamically (e.g. Flit).

* Clarify that `Version` cannot be specified in `Dynamic` for wheels

* Fix broken links due to an expired SSL cert

* Update core-metadata.rst

Author: brettcannon

source/specifications/binary-distribution-format.rst

@@ -315,10 +315,10 @@ checker only needs to establish that RECORD matches the signature.
 
 See
 
-- https://self-issued.info/docs/draft-ietf-jose-json-web-signature.html
-- https://self-issued.info/docs/draft-jones-jose-jws-json-serialization.html
-- https://self-issued.info/docs/draft-ietf-jose-json-web-key.html
-- https://self-issued.info/docs/draft-jones-jose-json-private-key.html
+- https://datatracker.ietf.org/doc/html/rfc7515
+- https://tools.ietf.org/id/draft-jones-json-web-signature-json-serialization-01.html
+- https://datatracker.ietf.org/doc/html/rfc7517
+- https://tools.ietf.org/id/draft-jones-jose-json-private-key-01.html
 
 
 Comparison to .egg

source/specifications/core-metadata.rst

@@ -106,7 +106,8 @@ Dynamic (multiple use)
 .. versionadded:: 2.2
 
 A string containing the name of another core metadata field. The field
-names ``Name`` and ``Version`` may not be specified in this field.
+names ``Name``, ``Version``, and ``Metadata-Version`` may not be specified
+in this field.
 
 When found in the metadata of a source distribution, the following
 rules apply: