chore(deps): Bump mamba-ssm in /backend/python/mamba

Bumps [mamba-ssm](https://github.com/state-spaces/mamba) from 1.2.0.post1 to 2.2.2.
- [Release notes](https://github.com/state-spaces/mamba/releases)
- [Commits](state-spaces/mamba@v1.2.0.post1...v2.2.2)

---
updated-dependencies:
- dependency-name: mamba-ssm
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

backend/python/mamba/requirements.txt

@@ -1,5 +1,5 @@
 causal-conv1d==1.4.0
-mamba-ssm==1.2.0.post1
+mamba-ssm==2.2.2
 grpcio==1.64.0
 protobuf
 certifi