Update MAINTAINERS.md (grafana#11666)

**What this PR does / why we need it**:
Removed the name of a departed employee from the maintainers list.

**Which issue(s) this PR fixes**:
Fixes #<issue number>

**Special notes for your reviewer**:

**Checklist**
- [ ] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [ ] Documentation added
- [ ] Tests updated
- [ ] `CHANGELOG.md` updated
- [ ] If the change is worth mentioning in the release notes, add
`add-to-release-notes` label
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/setup/upgrade/_index.md`
- [ ] For Helm chart changes bump the Helm chart version in
`production/helm/loki/Chart.yaml` and update
`production/helm/loki/CHANGELOG.md` and
`production/helm/loki/README.md`. [Example
PR](grafana@d10549e)
- [ ] If the change is deprecating or removing a configuration option,
update the `deprecated-config.yaml` and `deleted-config.yaml` files
respectively in the `tools/deprecated-config-checker` directory.
[Example
PR](grafana@0d4416a)

Co-authored-by: J Stickler <julie.stickler@grafana.com>

MAINTAINERS.md

@@ -1,4 +1,4 @@
 @slim-bean is the main/default maintainer.
 
 Some parts of the codebase have other maintainers:
-- `@grafana/docs-logs`, which includes [@osg-grafana](https://github.com/osg-grafana) ([Grafana Labs](https://grafana.com/)) and [@knylander-grafana](https://github.com/knylander-grafana) ([Grafana Labs](https://grafana.com/))
+- `@grafana/docs-logs`, which includes [@knylander-grafana](https://github.com/knylander-grafana) ([Grafana Labs](https://grafana.com/))