Add missing news fragments related to rich adoption

pradyunsg · pradyunsg · commit 1b53e589743d · 2021-12-03T15:07:45.000Z
diff --git a/news/10462.feature.rst b/news/10462.feature.rst
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+Utilise ``rich`` for presenting pip's default download progress bar.
diff --git a/news/10462.removal.rst b/news/10462.removal.rst
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+Deprecate alternative progress bar styles, leaving only ``on`` and ``off`` as available choices.

Original file line number	Diff line number	Diff line change
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	`1`	+Utilise ``rich`` for presenting pip's default download progress bar.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Deprecate alternative progress bar styles, leaving only ``on`` and ``off`` as available choices.