fix(value): corrected classname reference

[noelmcloughlin]

This Pull Request is a bug-fix change proposal, believed to be of low risk to the ontology and its downstream resources.

There is no element named UcoThing-identifier-shape in core, nearest match is UcoThing-identifier-regex-shape so that is probably intended value.

Coordination

• Tracking in Jira ticket OC-286
• [x] Pull Request is against correct branch
• [x] Pull Request is in, or reverted to, Draft status before Solutions Approval vote has passed.
• [x] CI passes in UCO feature branch
• [x] CI passes in UCO current unstable branch (e4341ae)
• [x] CI passes in CASE current unstable branch tracking UCO's unstable as submodule (1162f6a)
• [x] Impact on SHACL validation reviewed for CASE-Examples (skipped; will just test on CASE website for any case-utils effects)
• [x] Impact on SHACL validation remediated for CASE-Examples (skipped)
• [x] Impact on SHACL validation reviewed for casework.github.io
• [x] Impact on SHACL validation remediated for casework.github.io (N/A)
• [x] Milestone linked
• [x] Solutions Approval vote logged on corresponding Issue (once logged, can be taken out of Draft PR status) (N/A)
• [x] Documentation logged in pending release page

[ajnelson-nist]

Hi! Thank you for the fix suggestion. I've done an update on your patch to base it off of develop, and I've changed the PR to target develop. This is to follow this repository's branching model, described here.