Add admonition example to doc card spec

Author: sserrata

demo/examples/tests/docCards.yaml

@@ -13,6 +13,18 @@ paths:
       responses:
         "200":
           description: OK
+  /docs-admon:
+    get:
+      summary: Doc card admonition operation
+      description: >
+        :::info
+        Returns documentation with **markdown** and <b>HTML</b> in descriptions inside an admonition.
+        :::
+      tags:
+        - docCards
+      responses:
+        "200":
+          description: OK
 
 tags:
   - name: docCards

packages/docusaurus-plugin-openapi-docs/src/openapi/__fixtures__/docCards/openapi.yaml

@@ -13,6 +13,18 @@ paths:
       responses:
         "200":
           description: OK
+  /docs-admon:
+    get:
+      summary: Doc card admonition operation
+      description: >
+        :::info
+        Returns documentation with **markdown** and <b>HTML</b> in descriptions inside an admonition.
+        :::
+      tags:
+        - docCards
+      responses:
+        "200":
+          description: OK
 
 tags:
   - name: docCards

packages/docusaurus-plugin-openapi-docs/src/openapi/openapi.test.ts

@@ -49,6 +49,8 @@ describe("openapi", () => {
       expect(tag?.description).toBe(
         "This tag shows **markdown** and <b>HTML</b> in the doc card."
       );
+      const op = yaml?.data.paths?.["/docs-admon"]?.get;
+      expect(op?.description).toContain(":::info");
     });
   });
 });