style(theme): remove pointer cursor on schema expansion control

Defaults to the standard arrow cursor on hover for a less clicky feel.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: sserrata

packages/docusaurus-theme-openapi-docs/src/theme/SchemaExpansion/_SchemaExpansion.scss

@@ -22,7 +22,6 @@
   align-items: center;
   justify-content: center;
   color: var(--ifm-color-emphasis-600);
-  cursor: pointer;
   line-height: 0;
   opacity: 0.7;
   transition:
@@ -74,7 +73,6 @@
   font-size: 0.8rem;
   line-height: 1.4;
   color: var(--ifm-color-emphasis-800);
-  cursor: pointer;
   transition:
     background-color 0.12s ease,
     color 0.12s ease;