chore(deps): Bump certifi in /demo/playground/examples in the pip gro…

…up (hyperledger#3084)

Bumps the pip group in /demo/playground/examples with 1 update: [certifi](https://github.com/certifi/python-certifi).


Updates `certifi` from 2024.6.2 to 2024.7.4
- [Commits](certifi/python-certifi@2024.06.02...2024.07.04)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: indirect
  dependency-group: pip
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Stephen Curran <swcurran@gmail.com>
Co-authored-by: jamshale <31809382+jamshale@users.noreply.github.com>