Bump pyjwt in /examples/reservations-bot-demo/cloud_function

Bumps [pyjwt](https://github.com/jpadilla/pyjwt) from 1.7.1 to 2.4.0.
- [Release notes](https://github.com/jpadilla/pyjwt/releases)
- [Changelog](https://github.com/jpadilla/pyjwt/blob/master/CHANGELOG.rst)
- [Commits](jpadilla/pyjwt@1.7.1...2.4.0)

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

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

Author: dependabot[bot]

examples/reservations-bot-demo/cloud_function/requirements.txt

@@ -9,7 +9,7 @@ idna==2.10
 protobuf==3.15.0
 pycparser==2.20
 pydantic==1.6.2
-PyJWT==1.7.1
+PyJWT==2.4.0
 requests==2.24.0
 six==1.15.0
 urllib3==1.26.5