Bump dash from 1.21.0 to 2.15.0 in /frontend/docker

Bumps [dash](https://github.com/plotly/dash) from 1.21.0 to 2.15.0.
- [Release notes](https://github.com/plotly/dash/releases)
- [Changelog](https://github.com/plotly/dash/blob/dev/CHANGELOG.md)
- [Commits](plotly/dash@v1.21.0...v2.15.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

frontend/docker/requirements.txt

@@ -1,5 +1,5 @@
 astropy==4.3.1
-dash==1.21.0
+dash==2.15.0
 dash-bootstrap-components==0.13.1
 dash-core-components==1.17.1
 dash-html-components==1.1.4

frontend/docker/requirements_arm64.txt

@@ -1,5 +1,5 @@
 astropy==5.1
-dash==1.21.0
+dash==2.15.0
 dash-bootstrap-components==0.13.1
 dash-core-components==1.17.1
 dash-html-components==1.1.4