Bump ruff from 0.0.252 to 0.0.259 (#15328)

* Bump ruff from 0.0.252 to 0.0.259

Bumps [ruff](https://github.com/charliermarsh/ruff) from 0.0.252 to 0.0.259.
- [Release notes](https://github.com/charliermarsh/ruff/releases)
- [Changelog](https://github.com/charliermarsh/ruff/blob/main/BREAKING_CHANGES.md)
- [Commits](https://github.com/charliermarsh/ruff/compare/v0.0.252...v0.0.259)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix new warnings

* Mypy

* Newsfile

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Erik Johnston <erik@matrix.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index 91118a8d84..d475fe7ae5 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -462,7 +462,7 @@ class FrozenEvent(EventBase):
         # Signatures is a dict of dicts, and this is faster than doing a
         # copy.deepcopy
         signatures = {
-            name: {sig_id: sig for sig_id, sig in sigs.items()}
+            name: dict(sigs.items())
             for name, sigs in event_dict.pop("signatures", {}).items()
         }
 
@@ -510,7 +510,7 @@ class FrozenEventV2(EventBase):
         # Signatures is a dict of dicts, and this is faster than doing a
         # copy.deepcopy
         signatures = {
-            name: {sig_id: sig for sig_id, sig in sigs.items()}
+            name: dict(sigs.items())
             for name, sigs in event_dict.pop("signatures", {}).items()
         }