exercices/concept/secrets: Add link to the integer division function in the instructions

[grgmiranda]

Just a little tweak, making more explicit what "integer function" refers to.

It's already linked in the HINTS, but not in the instructions.

[github-actions]

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• General steps

  • 🏆 Does this PR need to receive a label with a reputation modifier (x:size/{tiny,small,medium,large,massive})? (A medium reputation amount is awarded by default, see docs)

• Any exercise changed

  • 👤 Does the author of the PR need to be added as an author or contributor in <exercise>/.meta/config.json (see docs)?
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  • 📜 Does the design file (<exercise>/.meta/design.md) need to be updated to document new implementation decisions?

• Concept exercise changed

  • 🌲 Do prerequisites and practices in config.json need to be updated?
  • 📖 Does the concept introduction provide all necessary information to solve this exercise?

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Automated comment created by PR Commenter 🤖.

[angelikatyborska]

Hi! Thank you for the PR. I am afraid I need to reject it. Exercise introductions and instructions do not contain links on purpose. Exercise introductions and instructions should be concise and explain enough knowledge to be able to solve the exercise, but they shouldn't overexplain. Hints are meant to provide links to specific functions necessary to solve the exercise.

[grgmiranda]

Oh, ok, sorry that I haven't notice this before, thanks!