chore: replace broken link with suggested one

[dextrot]

Description

This PR fixes #132

• replaces https://data.noaa.gov/ISO19139/resources/codeList.xml#SV_CouplingType, which throws 404s, with suggested link: https://data.noaa.gov/resources/iso19139/schema/srv/serviceMetadata.xsd for srv:SV_CouplingType

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist before requesting a review

• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[dextrot]

@geofrizz @ChrisJohnNOAA I raised this pull request updating the link. Please let me know if I should make any further changes, here.

Thank you.

[ChrisJohnNOAA]

@geofrizz @ChrisJohnNOAA I raised this pull request updating the link. Please let me know if I should make any further changes, here.

Thank you.

I'm not sure that is the correct link. Part of the task is making sure the link is correct. Bob has a comment on the issue about where might be a good place to look.

[dextrot]

@geofrizz @ChrisJohnNOAA I raised this pull request updating the link. Please let me know if I should make any further changes, here.
Thank you.

I'm not sure that is the correct link. Part of the task is making sure the link is correct. Bob has a comment on the issue about where might be a good place to look.

Thank you, will investigate the correct link.

[ChrisJohnNOAA]

officially marking as changes requested for getting a better link