README.md in trackler-2.2.1.94

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 ## Working on the Exercises
 
 ### Implementing an exercise
 
-A pool of exercises can be found in the [x-Common repo](https://github.com/exercism/x-common).
+A pool of exercises can be found in the [problem-specifications repo](https://github.com/exercism/problem-specifications).
 
 Exercises for the Julia track go in the `exercises` directory and should follow the following filename conventions:
 
 `exercises/<slug>/<slug>.jl` Skeleton for the function that is called by the test suite. Provide (abstract) parameter and return types to ensure compatibility with the test suite.