Update incorrect link in address and change language patterns

[precious-onyenaucheya-ons]

What is the context of this PR?

Fixes #3207 and #3208

This PR updates the links in the address and change language pattern examples

How to review this PR

• Check that all links in the pattern works in the DS and SM projects

  Checklist

This needs to be completed by the person raising the PR.

• [x] I have selected the correct Assignee
• [x] I have linked the correct Issue

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[rmccar]

We need to make the PR title and description a bit more descriptive and a bit more explanation of how to review.

I haven't tested it in the service manual but the change seems to make no difference in the DS and the content of the Welsh example in the DS is all in Welsh already so is this a service manual issue?