Fix wc_RsaKeyToDer docs return value

[mspiegel]

Description

Documentation for wc_RsaKeyToDer() return value is incorrect.

Fixes zd#

Testing

How did you test?

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[wolfSSL-Bot]

Can one of the admins verify this patch?

[anhu]

hello @mspiegel ,
I've checked and it appears you do not have a signed contributor agreement with wolfSSL. This is a fairly minor contribution and we typically wouldn't take such a small change. Are you planning to add anymore changes?

[mspiegel]

I may submit changes in the future, but I don't have any more changes to this pull request regarding documentation. I am available to sign a contributor agreement.

[anhu]

Hi @mspiegel ,

I've spoken with the internal engineering team. Usually when we get smaller minor fixes, we can treat them as suggested bug fixes. This prevents you from going through the trouble of signing a contributor form and having to submit your personal data to us.

This message will now close this PR in favour of #6837 .

Thank you so much for bringing this to our attention!!

Warm regards, Anthony