Fix typo in C API header (microsoft#1753)

### Description

This PR fixes a typo in the C API header with `OgaRequest`.

### Motivation and Context

This PR fixes [this
issue](microsoft#1752).

Author: kunal-vaishnavi

src/ort_genai_c.h

@@ -78,7 +78,7 @@ typedef struct OgaAudios OgaAudios;
 typedef struct OgaStringArray OgaStringArray;
 typedef struct OgaAdapters OgaAdapters;
 typedef struct OgaEngine OgaEngine;
-typedef struct OgaRequest OgqRequest;
+typedef struct OgaRequest OgaRequest;
 
 //! @}