feat: Add Zanzibar pizza

[Mugabe000]

Description

This PR adds Zanzibar Pizza to pizza-recipes.md

What type of PR is this? (check all applicable)

• [ ] ☝️ Add a pizza fact or trivia
• [x] 🧑‍🍳 Add a pizza recipe
• [x] 🗺️ Add a regional pizza
• [ ] 📝 Documentation Update

Related Tickets & Documents

Relates to #32 and #35

Added to documentation?

• [ ] 📜 README.md
• [x] 🙅 no documentation needed

[optional] What GIF best describes this PR or how it makes you feel?

[Mugabe000]

Hello @CBID2, your commit suggestions have been put into practice.

[Mugabe000]

Okay