test(project): verbatim text pins block fixing change-relative and wrong prose #2228

Is your feature request related to a problem? Please describe.
These tests pin prose verbatim, so the prose cannot be reworded to describe current behaviour without editing the pin as well:

• test_docs_internal_refs_1947_unit CONVERTED requires "dropped" + the TransportProtocol role, from "reg: drop TransportProtocol's IntFlag base once nothing builds a composite #808 dropped TransportProtocol's IntFlag base" in the apptype vendor and const modules.
• test_const_method_value_lookup_908_unit requires "value were both the :class:bytes object" in the Method.get docstring, in the source and in the rendered template.
• test_docs_internal_refs_1940_unit CONVERTED requires the compat.cached_property role on sentinel-convention.rst, where the prose calls it the "backport" that Require Python 3.8+ and drop the BPC conversion for 1.5.0 #2051 removed. compat.cached_property is now a functools re-export.
• test_issue_refs_in_comments META_MENTIONS pins the comment ":ref: half passed before the change too" in test_changelog_md's test_an_unknown_role_is_still_fatal; rewording it fails with "stale META_MENTIONS entries".
• test_unit_tests_queue BARE_ELSEWHERE pins :631-647 in releasing.rst, a line citation of third-party code. Those lines are in release() in action-gh-release 3.0.2's src/github.ts.

Describe the solution you'd like
Reword each sentence and update its pin in the same PR. Cite the action by function name (release()), then drop the BARE_ELSEWHERE entry. Where a pin only guards a role conversion, pin the role instead of the sentence around it.

Additional context
Found while verifying #1103 prose fixes.