Bump idna from 2.10 to 3.7 in /capstone/src/main/python

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v2.10...v3.7)

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

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

Author: dependabot[bot]

capstone/src/main/python/requirements.txt

@@ -24,7 +24,7 @@ gunicorn==20.0.4
 h5py==2.10.0
 httplib2==0.18.1
 humanize==2.5.0
-idna==2.10
+idna==3.7
 importlib-metadata==1.7.0
 ipython==7.16.1
 ipython-genutils==0.2.0