docs: update wrong php types in \InfluxDB2\Point

[trandbert37]

Closes #

Proposed Changes

Briefly describe your proposed changes:

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• make test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (f72f191) 74.86% compared to head (1c73dd1) 74.86%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #148   +/-   ##
=========================================
  Coverage     74.86%   74.86%           
- Complexity      424      428    +4     
=========================================
  Files            25       25           
  Lines          1094     1094           
=========================================
  Hits            819      819           
  Misses          275      275           

Files Changed	Coverage Δ
src/InfluxDB2/Point.php	100.00% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.