Bump scipp from 26.1.0 to 26.1.1 in /requirements

Bumps [scipp](https://github.com/scipp/scipp) from 26.1.0 to 26.1.1.
- [Release notes](https://github.com/scipp/scipp/releases)
- [Commits](scipp/scipp@26.1.0...26.1.1)

---
updated-dependencies:
- dependency-name: scipp
  dependency-version: 26.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -12,7 +12,7 @@ numpy==2.4.1
     #   h5py
     #   scipp
     #   scipy
-scipp==26.1.0
+scipp==26.1.1
     # via -r base.in
 scipy==1.17.0
     # via -r base.in

requirements/nightly.txt

@@ -25,7 +25,7 @@ pygments==2.19.2
     # via pytest
 pytest==9.0.2
     # via -r nightly.in
-scipp==100.0.0.dev0
+scipp==26.1.1
     # via -r nightly.in
 scipy==1.17.0
     # via -r nightly.in