DOC: Add missing Index.infer_objects link to API reference (#61736)

* DOC: Fix missing infer_objects link in Index API reference

* DOC: Add whatsnew entry for Index.infer_objects link fix

* DOC: fixed alphabetical order in indexing.rst

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Removed whatsnew reference

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: PreethamYerragudi

doc/source/reference/indexing.rst

@@ -98,6 +98,7 @@ Conversion
    :toctree: api/
 
    Index.astype
+   Index.infer_objects
    Index.item
    Index.map
    Index.ravel