Fixed dead link to eScience Center language guides

[tpronk]

Summary

Fixes a dead link to the eScience Center language guides.

• Old (dead) link: https://guide.esciencecenter.nl/best_practices/language_guides/languages_overview.html
• New (working) link: https://guide.esciencecenter.nl/#/best_practices/language_guides/languages_overview

List of changes proposed in this PR (pull-request)

• Dead link fix

What should a reviewer concentrate their feedback on?

• Check if the new link points to the right page

Acknowledging contributors

• All contributors to this pull request are already named in the table of contributors in the README file.
• The following people should be added to the table of contributors in the README file: GitHubID = 8987504, Profile = https://github.com/tpronk

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[da5nsy]

Thank you for the contribution @tpronk!
All LGTM!

[da5nsy]

@all-contributors please add @tpronk for bugs

[allcontributors]

@da5nsy

I've put up a pull request to add @tpronk! 🎉

[da5nsy]

Feel free to go ahead and hit merge @tpronk! 👍

[tpronk]

Cool! I don't think I've got the rights to hit merge though @da5nsy

[da5nsy]

Oop, sorry, my bad!

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Congrats on merging your first pull request! 🎉 We here at The Turing Way are proud of you! 💖 Thank you so much for your contribution 🎁