OCORE-83: Fixing accessibility errors in the HTML file

[DemeSzabolcs]

This is a fix for the accessibility errors in the index.html file. Below you can see the accessibility errors:

Asserting the accessibility analysis result failed. Check the accessibility report failure dump for details.
-------- Shouldly.ShouldAssertException : axeResult.Violations
    should be empty but had
1
    item and was
[Selenium.Axe.AxeResultItem (14851760)]

Additional Info:
    Links must have discernible text: 
    <a class="btn btn-dark m-3" href="<https://twitter.com">>
            <i class="fab fa-twitter"></i>
        </a>
    <a class="btn btn-dark m-3" href="<https://facebook.com">>
            <i class="fab fa-facebook-f"></i>
        </a>
    <a class="btn btn-dark m-3" href="<https://instagram.com">>
            <i class="fab fa-instagram"></i>
        </a>

[DemeSzabolcs]

@davidtmiller If you don’t mind me asking: have you seen this PR yet?

[DemeSzabolcs]

@davidtmiller

[DemeSzabolcs]

@davidtmiller