Update footer_extra.html

[sallybracegirdle]

Change of link to FMS Pro page and updated copy.

Please check the following:

• [ ] Has the code POD documentation been added or updated?
• [ ] Whether this PR should include changes to any public documentation, or the FAQ;
• [ ] All cobrand-specific commits start their commit message with the cobrand in square brackets;
• [ ] Is new functionality tested? CodeCov will warn you about the diff coverage, but won’t complain about e.g. new files;
• [ ] Will cobrand-specific changes require additional work to ensure consistent behaviour on www.fixmystreet.com?
• [ ] Are the changes tested for accessibility?
• [ ] Have you updated the changelog? If this is not necessary, put square brackets around this: skip changelog

Please check the contributing docs, and describe your pull request here. Screenshots or GIF animations (using e.g. LICEcap) may be helpful.

Please include any issues that are fixed, using "fixes" or "closes" so that they are auto-closed when the PR is merged.

Thanks for contributing!

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.78%. Comparing base (621c8a5) to head (2c1de73).

:exclamation: Current head 2c1de73 differs from pull request most recent head aec6f8e

Please upload reports for the commit aec6f8e to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5002 +/- ## ========================================== + Coverage 82.62% 82.78% +0.15% ========================================== Files 393 393 Lines 30784 31088 +304 Branches 4882 4999 +117 ========================================== + Hits 25436 25736 +300 - Misses 3900 3901 +1 - Partials 1448 1451 +3 ```

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