Update pandas requirement from ~=2.1.0 to ~=2.1.1 (#305)

Updates the requirements on [pandas](https://github.com/pandas-dev/pandas) to permit the latest version.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](pandas-dev/pandas@v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: pandas
  dependency-type: direct:production
...

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

requirements.txt

@@ -11,7 +11,7 @@ ase~=3.22.1
 seekpath~=2.1.0
 widget-bzvisualizer~=0.1.0b10
 plotly~=5.17.0
-pandas~=2.1.0
+pandas~=2.1.1
 nglview~=3.0.8
 moviepy~=1.0.3
 ipyevents~=2.0.2