Bump pandas from 2.0.3 to 2.1.2

Bumps [pandas](https://github.com/pandas-dev/pandas) from 2.0.3 to 2.1.2.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](https://github.com/pandas-dev/pandas/compare/v2.0.3...v2.1.2)

---
updated-dependencies:
- dependency-name: pandas
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,5 +1,5 @@
 numpy==1.26.1
-pandas==2.0.3
+pandas==2.1.2
 pandas-ta==0.3.14b
 
 ccxt==4.1.31