Bump flask-caching from 2.0.2 to 2.1.0

Bumps [flask-caching](https://github.com/pallets-eco/flask-caching) from 2.0.2 to 2.1.0.
- [Release notes](https://github.com/pallets-eco/flask-caching/releases)
- [Changelog](https://github.com/pallets-eco/flask-caching/blob/master/CHANGES.rst)
- [Commits](pallets-eco/flask-caching@v2.0.2...v2.1.0)

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

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

requirements.txt

@@ -4,7 +4,7 @@ click==8.1.7
 commonmark==0.9.1
 Flask==2.3.3
 Flask-APScheduler==1.13.0
-Flask-Caching==2.0.2
+Flask-Caching==2.1.0
 Flask-WTF==1.2.1
 idna==3.4
 itsdangerous==2.1.2