build(deps): bump idna from 3.2 to 3.3

Bumps [idna](https://github.com/kjd/idna) from 3.2 to 3.3.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.2...v3.3)

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

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

requirements-pinned.txt

@@ -2,7 +2,7 @@ certifi==2021.5.30        # via requests
 cffi==1.14.6              # via cryptography, pynacl
 charset-normalizer==2.0.6 # via requests
 cryptography==35.0.0       # via securesystemslib
-idna==3.2                 # via requests
+idna==3.3                 # via requests
 pycparser==2.20           # via cffi
 pynacl==1.4.0             # via securesystemslib
 requests==2.26.0