Fix defgroup syntax for API version section
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 68a4f65..d3b7522 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -57,7 +57,7 @@
  * algorithms, key types, policies, etc. */
 #include "crypto_types.h"
 
-/** \defgroup API version
+/** \defgroup version API version
  * @{
  */