chore(deps): bump drf-spectacular-sidecar from 2026.3.1 to 2026.4.1 (#14658)

Bumps [drf-spectacular-sidecar](https://github.com/tfranzel/drf-spectacular-sidecar) from 2026.3.1 to 2026.4.1.
- [Commits](tfranzel/drf-spectacular-sidecar@2026.3.1...2026.4.1)

---
updated-dependencies:
- dependency-name: drf-spectacular-sidecar
  dependency-version: 2026.4.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -59,7 +59,7 @@ django-fieldsignals==0.8.0
 hyperlink==21.0.0
 djangosaml2==1.12.0
 drf-spectacular==0.29.0
-drf-spectacular-sidecar==2026.3.1
+drf-spectacular-sidecar==2026.4.1
 django-ratelimit==4.1.0
 argon2-cffi==25.1.0
 blackduck==1.1.3