Added link to exercise 0

Author: jaboehri

exercises/prerequisites.md

@@ -1,4 +1,4 @@
-**Prerequisites** • [Exercise 1](exercise-1.md) • [Exercise 1.1](exercise-1-1.md) • [Exercise 2](exercise-2.md) • [Exercise 4](exercise-4.md) • [Exercise 5](exercise-5.md) • [Exercise 6](exercise-6.md)
+**Prerequisites** • [Exercise 0](exercise-0.md) • [Exercise 1](exercise-1.md) • [Exercise 1.1](exercise-1-1.md) • [Exercise 2](exercise-2.md) • [Exercise 4](exercise-4.md) • [Exercise 5](exercise-5.md) • [Exercise 6](exercise-6.md)
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 # Prerequisites
@@ -57,4 +57,4 @@ relies on Camunda 7 which is incompatible with Camunda 8.
 The minimum hardware requirements to run all simulated organizations as part of the Docker dev-setup is 16 GB of RAM.
 
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-**Prerequisites** • [Exercise 1](exercise-1.md) • [Exercise 1.1](exercise-1-1.md) • [Exercise 2](exercise-2.md) • [Exercise 4](exercise-4.md) • [Exercise 5](exercise-5.md) • [Exercise 6](exercise-6.md)
+**Prerequisites** • [Exercise 0](exercise-0.md) • [Exercise 1](exercise-1.md) • [Exercise 1.1](exercise-1-1.md) • [Exercise 2](exercise-2.md) • [Exercise 4](exercise-4.md) • [Exercise 5](exercise-5.md) • [Exercise 6](exercise-6.md)