Fix issue parsing Image Details from API due to incorrect struct json field

[itsdax]

Description

Issue is described here: #1378
API returns the metadata object under the field meta. However the SDK expects the field metadata thus it always drops this data from the response.

Has your change been tested?

Yes - after changing the struct field for Metadata to meta, GetImage calls return images with Metadata field populated.

Screenshots (if appropriate):

https://developers.cloudflare.com/api/operations/cloudflare-images-image-details

Refer to the response example of Image details. Specifically the meta field. The current SDK expects metadata and thus it always drops the metadata from the response.

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 in cloudflare/api-schemas
  and relies on stable APIs.

[github-actions]

changelog detected ✅

[codecov-commenter]

Codecov Report

Merging #1379 (12bd338) into master (b9ac804) will increase coverage by 0.00%.
Report is 203 commits behind head on master.
The diff coverage is 49.62%.

@@           Coverage Diff            @@
##           master    #1379    +/-   ##
========================================
  Coverage   48.33%   48.34%            
========================================
  Files         133      139     +6     
  Lines       13023    13749   +726     
========================================
+ Hits         6295     6647   +352     
- Misses       5201     5453   +252     
- Partials     1527     1649   +122     

Files Changed	Coverage Δ
access_audit_log.go	79.31% <ø> (ø)
access_bookmark.go	72.44% <ø> (ø)
access_keys.go	71.42% <ø> (ø)
access_organization.go	53.84% <ø> (ø)
access_service_tokens.go	51.85% <ø> (ø)
account_members.go	65.54% <ø> (ø)
account_roles.go	53.84% <ø> (ø)
accounts.go	50.81% <ø> (ø)
addressing_address_map.go	39.04% <ø> (ø)
addressing_ip_prefix.go	45.45% <ø> (ø)
... and 121 more

... and 1 file with indirect coverage changes

[jacobbednarz]

thanks for the PR! added some notes inline.

[github-actions]

This functionality has been released in v0.76.0.

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