Fix API Reference formatting to match other boxes

- Consolidated multi-line h3 and p tags to single lines
- Consolidated multi-line anchor tags to single lines
- Made formatting consistent with Price Feed IDs and Examples boxes

Co-Authored-By: Jayant <[email protected]>

Author: devin-ai-integration[bot]

pages/price-feeds/index.mdx

@@ -95,25 +95,11 @@ Pyth offers two main versions of price feeds, each optimized for different use c
 {" "}
 
 <div className="p-6 bg-gray-50 dark:bg-darkGray rounded-lg border border-gray-200 dark:border-gray-700">
-  <h3 className="text-lg font-semibold mb-2 text-lightForeground dark:text-white">
-    API Reference
-  </h3>
-  <p className="text-gray-700 dark:text-light mb-4">
-    Complete API documentation for both Pro and Core.
-  </p>
-  <a
-    href="./price-feeds/core/api-reference"
-    className="text-lightLinks dark:text-darkLinks hover:text-blue-800 dark:hover:text-blue-300 font-medium"
-  >
-    Core APIs →
-  </a>
+  <h3 className="text-lg font-semibold mb-2 text-lightForeground dark:text-white">API Reference</h3>
+  <p className="text-gray-700 dark:text-light mb-4">Complete API documentation for both Pro and Core.</p>
+  <a href="./price-feeds/core/api-reference" className="text-lightLinks dark:text-darkLinks hover:text-blue-800 dark:hover:text-blue-300 font-medium">Core APIs →</a>
   <span className="mx-2 text-gray-400">|</span>
-  <a
-    href="./price-feeds/pro/api-reference"
-    className="text-lightLinks dark:text-darkLinks hover:text-blue-800 dark:hover:text-blue-300 font-medium"
-  >
-    Pro API →
-  </a>
+  <a href="./price-feeds/pro/api-reference" className="text-lightLinks dark:text-darkLinks hover:text-blue-800 dark:hover:text-blue-300 font-medium">Pro API →</a>
 </div>
 
   <div className="p-6 bg-gray-50 dark:bg-darkGray rounded-lg border border-gray-200 dark:border-gray-700">