Bump posthog SDK version to 3.2.0

[BillCarsonFr]

Bump posthog version to 3.2.0.
We were using a quite old posthog sdk. Updating to the new one mainly because it now support sessions. Allow us to have a per device view instead of only unique users that is merging events from all the devices of the same user.
Element X Android is already using posthog 3.x

Pull Request Checklist

• I read the contributing guide
• Pull request contains a changelog file in ./changelog.d
• Pull request includes a sign off

UI changes have been tested with:

• iPhone and iPad simulators in portrait and landscape orientations.
• Dark mode enabled and disabled.
• Various sizes of dynamic type.
• Voiceover enabled.

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	Please add a sign-off to either the PR description or to the commits themselves.

Generated by 🚫 Danger Swift against e1499cb

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 73.35%. Comparing base (c398338) to head (1afc242).

❗ Current head 1afc242 differs from pull request most recent head e1499cb. Consider uploading reports for the commit e1499cb to get more accurate results

Files	Patch %	Lines
...es/Services/Analytics/PostHogAnalyticsClient.swift	60.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2788      +/-   ##
===========================================
+ Coverage    73.32%   73.35%   +0.03%     
===========================================
  Files          597      597              
  Lines        42686    42696      +10     
===========================================
+ Hits         31298    31320      +22     
+ Misses       11388    11376      -12     

Flag	Coverage Δ
unittests	62.27% <83.33%> (+0.04%)	⬆️

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud