Upgrade okhttp to resolve CVE-2023-3635

[CVE-2023-3635](https://nvd.nist.gov/vuln/detail/CVE-2023-3635) was reported as a vulnerability of okio which okhttp (version 3.14.7) used in the Talon.One SDK depends on. 

Could you please update okhttp to use a version which includes the fix?

For further reference, see also:

https://osv.dev/vulnerability/GHSA-w33c-445m-f8w7
https://github.com/square/okhttp/issues/8013