DOC: GH27557 Updates Python support documentation to match NumPy NEP 29 (#46883)

Author: JosephParampathu

doc/source/development/policies.rst

@@ -51,7 +51,7 @@ pandas may change the behavior of experimental features at any time.
 Python support
 ~~~~~~~~~~~~~~
 
-pandas will only drop support for specific Python versions (e.g. 3.6.x, 3.7.x) in
-pandas **major** or **minor** releases.
+pandas mirrors the `NumPy guidelines for Python support <https://numpy.org/neps/nep-0029-deprecation_policy.html#implementation>`__.
+
 
 .. _SemVer: https://semver.org