fix: Rename custom authorizer to Lambda authorizer

[galer7]

AWS renamed customer authorizer to Lambda authorizer, as per docs.
Previous link routes to welcome page now.

[dsabalete]

LGTM

[darigovresearch]

@galer7 Thanks for the pull request

Do the maintainers need anything else for the pull request to be merged?

[galer7]

@darigovresearch No problem!
I don't think so, but let me know if I can be of any more help.

[stevewright82]

@galer7 - you closed this. I'm curious, because it didn't get merged. Does anyone know who can approve merges?

[galer7]

Hey @stevewright82, I think this PR requires another approval, but I don't know where to get it from 😄.
The changes are still valid, as the current link points to the wrong page.

[stevewright82]

Hey @stevewright82, I think this PR requires another approval, but I don't know where to get it from 😄. The changes are still valid, as the current link points to the wrong page.

I've messaged @jlevy @ThanosBaskous and @QuinnyPig in the og-aws Slack to see if they can help.