Documentation fix in Customizing OpenSAML’s AuthnRequest Instance section

[nor-ek]

According to the wrong example in the Customizing OpenSAML’s AuthnRequest Instance section I've fixed it.
What is done:

• replace Converter<MySaml2AuthenticationRequestContext, AuthnRequest> by Converter<Saml2AuthenticationRequestContext, AuthnRequest>
• replace MySaml2AuthenticationRequestContext by Saml2AuthenticationRequestContext in AuthnRequestConverter. (Not sure if its correct example)

[jzheaux]

Thanks, @nor-ek!

Will you please adjust your commit to include the ticket in the message instead of the title, like so?

Commit Title

Closes gh-10364

Also, you might consider squashing your commits as this will simplify backporting.

[nor-ek]

@jzheaux should be better.

[jzheaux]

Thanks @nor-ek. This is merged via 9316241 along with a polish of 2dac210