Merge maintenance/3.1.x into main following 3.1.1 release (#9618)

Author: Pierre-Sassoulas

doc/whatsnew/3/3.1/index.rst

@@ -17,6 +17,29 @@ and a smattering of bug fixes.
 
 .. towncrier release notes start
 
+What's new in Pylint 3.1.1?
+---------------------------
+Release date: 2024-05-13
+
+
+False Positives Fixed
+---------------------
+
+- Treat `attrs.define` and `attrs.frozen` as dataclass decorators in
+  `too-few-public-methods` check.
+
+  Closes #9345 (`#9345 <https://github.com/pylint-dev/pylint/issues/9345>`_)
+
+- Fix a false positive with ``singledispatchmethod-function`` when a method is decorated with both ``functools.singledispatchmethod`` and ``staticmethod``.
+
+  Closes #9531 (`#9531 <https://github.com/pylint-dev/pylint/issues/9531>`_)
+
+- Fix a false positive for ``consider-using-dict-items`` when iterating using ``keys()`` and then deleting an item using the key as a lookup.
+
+  Closes #9554 (`#9554 <https://github.com/pylint-dev/pylint/issues/9554>`_)
+
+
+
 What's new in Pylint 3.1.0?
 ---------------------------
 Release date: 2024-02-25