[Doc] Fix some links and references

[javiereguiluz]

It fixes the following errors reported by Symfony Docs builder:

Errors for SchebTwoFactorBundle / 5.x

Build errors from "2022-05-02 01:21:26"

Found invalid reference "/google" in file "providers/totp"
Found invalid reference "/google" in file "providers/totp"
Found invalid reference "/totp" in file "providers/google"
Found invalid reference "/totp" in file "providers/google"
Found invalid reference "/totp" in file "providers/google"
Found invalid reference "/totp" in file "providers/google"
Found invalid reference "/../firewall_template" in file "providers/google"
Found invalid reference "/../firewall_template" in file "providers/google"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"
Found invalid reference "/https://github.com/scheb/2fa/issues/new?labels=Support&template=support-request" in file "troubleshooting"

[scheb]

Thanks for fixing this! I didn't realize these links were broken and therefore missing in the rendering. Also picked it over to the 6.x branch.

Is there a way how I can see those errors myself?

[javiereguiluz]

Yes. You can see doc build errors here: https://symfony.com/doc/build_errors

We built docs every night, so that page doesn't show errors in real time. Cheers.

[scheb]

Great, good to know, thanks for sharing 👍