docs: Update link to ShouldJS repo (#8191)

_This is my first and probably only contribution to this repo. Hope this helps._

docs/MigrationGuide.md

@@ -11,7 +11,7 @@ If you'd like to try out Jest with an existing codebase, there are a number of w
 
 ## jest-codemods
 
-If you are using [AVA](https://github.com/avajs/ava), [Chai](https://github.com/chaijs/chai), [Expect.js (by Automattic)](https://github.com/Automattic/expect.js), [Jasmine](https://github.com/jasmine/jasmine), [Mocha](https://github.com/mochajs/mocha), [proxyquire](https://github.com/thlorenz/proxyquire), [Should.js](https://github.com/tj/should.js/) or [Tape](https://github.com/substack/tape) you can use the third-party [jest-codemods](https://github.com/skovhus/jest-codemods) to do most of the dirty migration work. It runs a code transformation on your codebase using [jscodeshift](https://github.com/facebook/jscodeshift).
+If you are using [AVA](https://github.com/avajs/ava), [Chai](https://github.com/chaijs/chai), [Expect.js (by Automattic)](https://github.com/Automattic/expect.js), [Jasmine](https://github.com/jasmine/jasmine), [Mocha](https://github.com/mochajs/mocha), [proxyquire](https://github.com/thlorenz/proxyquire), [Should.js](https://github.com/shouldjs/should.js) or [Tape](https://github.com/substack/tape) you can use the third-party [jest-codemods](https://github.com/skovhus/jest-codemods) to do most of the dirty migration work. It runs a code transformation on your codebase using [jscodeshift](https://github.com/facebook/jscodeshift).
 
 Install Jest Codemods with `yarn` by running: