fix(docs): Fix routing for accessibility documentation

[sophieH29]

When heading navigation within the article was implemented initially for Accessibility documentation, there were "/" sign added to each link. Since deployed version has a different route /react/, these links were rewriting /react/ part what caused 404 error when navigating.

[codecov]

Codecov Report

Merging #1208 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1208   +/-   ##
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  Coverage   82.55%   82.55%           
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  Files         751      751           
  Lines        8854     8854           
  Branches     1178     1178           
=======================================
  Hits         7309     7309           
  Misses       1530     1530           
  Partials       15       15

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[mnajdova]

Please add changelog entry

[kuzhelov]

given that those are the links to the same page, suggest to use just id selector as their content - this would solve all the maintainability headache:

{link('Keyboard Navigation', '#keyboard-navigation')}

[sophieH29]

I've tried that approach, unfortunately, it does not work that way. That query part is not added to the end but rewrites the path

[miroslavstastny]

There are anchor links next to each header on the page which are broken as well:

[sophieH29]

There are anchor links next to each header on the page which are broken as well:

They're broken across all pages. I think a separate PR should be addressed to fix that issue. Filed a bug #1210