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gh-134370: Added clarification on instance annotations (#134387)

Instances of classes cannot have annotations,however sometimes they will erroneously have the__annotations__ attribute

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Original file line number	Diff line number	Diff line change
@@ -248,4 +248,9 @@ quirks by using :func:`annotationlib.get_annotations` on Python 3.14+ or
`248`	`248`	:func:`inspect.get_annotations` on Python 3.10+. On earlier versions of
`249`	`249`	`Python, you can avoid these bugs by accessing the annotations from the`
`250`	`250`	class's:attr:`~type.__dict__`
`251`		-(e.g., ``cls.__dict__.get('__annotations__', None)``).
	`251`	+(for example, ``cls.__dict__.get('__annotations__', None)``).
	`252`	`+`
	`253`	+In some versions of Python, instances of classes may have an ``__annotations__``
	`254`	`+attribute. However, this is not supported functionality. If you need the`
	`255`	+annotations of an instance, you can use:func:`type` to access its class
	`256`	+(for example, ``annotationlib.get_annotations(type(myinstance))`` on Python 3.14+).

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