[WebAuthn] Fix crash when making assertions

https://bugs.webkit.org/show_bug.cgi?id=241814
rdar://95618710

Reviewed by Brent Fulgham.

We return an NSData inside _WKAuthenticatorAssertionResponse with ref count 0. To fix this,
we use autorelease as we do in the _WKAuthenticatorAttestationResponse case.

* Source/WebKit/UIProcess/API/Cocoa/_WKWebAuthenticationPanel.mm:
(wkAuthenticatorAssertionResponse):

Canonical link: https://commits.webkit.org/251707@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@295702 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/UIProcess/API/Cocoa/_WKWebAuthenticationPanel.mm

@@ -929,7 +929,7 @@ - (void)makeCredentialWithClientDataHash:(NSData *)clientDataHash options:(_WKPu
     if (data.userHandle)
         userHandle = [NSData dataWithBytes:data.userHandle->data() length:data.userHandle->byteLength()];
 
-    return adoptNS([[_WKAuthenticatorAssertionResponse alloc] initWithClientDataJSON:clientDataJSON rawId:[NSData dataWithBytes:data.rawId->data() length:data.rawId->byteLength()] extensionOutputsCBOR:toNSData(data.extensionOutputs->toCBOR()).get() authenticatorData:[NSData dataWithBytes:data.authenticatorData->data() length:data.authenticatorData->byteLength()] signature:[NSData dataWithBytes:data.signature->data() length:data.signature->byteLength()] userHandle:userHandle attachment:authenticatorAttachmentToWKAuthenticatorAttachment(attachment)]);
+    return adoptNS([[_WKAuthenticatorAssertionResponse alloc] initWithClientDataJSON:clientDataJSON rawId:[NSData dataWithBytes:data.rawId->data() length:data.rawId->byteLength()] extensionOutputsCBOR:toNSData(data.extensionOutputs->toCBOR()).autorelease() authenticatorData:[NSData dataWithBytes:data.authenticatorData->data() length:data.authenticatorData->byteLength()] signature:[NSData dataWithBytes:data.signature->data() length:data.signature->byteLength()] userHandle:userHandle attachment:authenticatorAttachmentToWKAuthenticatorAttachment(attachment)]);
 }
 #endif