Fix UpdateTurnstileWidget

[punkeel]

Description

The request body must not include sitekey/secret, but did. This fixes it.

Types of changes

What sort of change does your code introduce/modify?

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• This change is using publicly documented (api.cloudflare.com or developers.cloudflare.com) and stable APIs.

[github-actions]

changelog detected ✅

[codecov-commenter]

Codecov Report

Merging #1284 (d555d68) into master (3508050) will decrease coverage by 0.01%.
The diff coverage is 48.57%.

❗ Current head d555d68 differs from pull request most recent head 41984cb. Consider uploading reports for the commit 41984cb to get more accurate results

@@            Coverage Diff             @@
##           master    #1284      +/-   ##
==========================================
- Coverage   49.07%   49.06%   -0.01%     
==========================================
  Files         133      134       +1     
  Lines       13032    13066      +34     
==========================================
+ Hits         6395     6411      +16     
- Misses       5143     5155      +12     
- Partials     1494     1500       +6     

Impacted Files	Coverage Δ
pages_project.go	50.81% <ø> (ø)
rulesets.go	34.64% <ø> (ø)
turnstile.go	67.76% <ø> (ø)
cache_reserve.go	43.75% <43.75%> (ø)
workers.go	59.01% <100.00%> (+0.45%)	⬆️

[github-actions]

This functionality has been released in v0.68.0.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!