x86/sgx: Add a missing colon in kernel-doc markup for "struct sgx_enclave_run"

Add a missing ':' for the description of sgx_enclave_run.reserved so that
documentation for the member is correctly generated:

  WARNING: arch/x86/include/uapi/asm/sgx.h:184 struct member 'reserved' not
  described in 'sgx_enclave_run'

Closes: https://lore.kernel.org/all/20251106145506.145fc620@canb.auug.org.au
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://patch.msgid.link/20251112160708.1343355-2-seanjc%40google.com

Author: sean-jc

arch/x86/include/uapi/asm/sgx.h

@@ -166,7 +166,7 @@ typedef int (*sgx_enclave_user_handler_t)(long rdi, long rsi, long rdx,
  * @exception_addr:		The address that triggered the exception
  * @user_handler:		User provided callback run on exception
  * @user_data:			Data passed to the user handler
- * @reserved			Reserved for future extensions
+ * @reserved:			Reserved for future extensions
  *
  * If @user_handler is provided, the handler will be invoked on all return paths
  * of the normal flow.  The user handler may transfer control, e.g. via a