docs: replace FlowType with TypeScript in CONTRIBUTING.MD code conventions (#9133)

Author: leonardovillela

CHANGELOG.md

@@ -112,6 +112,7 @@
 
 ### Chore & Maintenance
 
+- `[docs]` Replace FlowType with TypeScript in CONTRIBUTING.MD code conventions
 - `[jest-leak-detector]` remove code repeat ([#8438](https://github.com/facebook/jest/pull/8438))
 - `[docs]` Add example to `jest.requireActual` ([#8482](https://github.com/facebook/jest/pull/8482))
 - `[docs]` Add example to `jest.mock` for mocking ES6 modules with the `factory` parameter ([#8550](https://github.com/facebook/jest/pull/8550))

CONTRIBUTING.md

@@ -213,7 +213,7 @@ Facebook has a [bounty program](https://www.facebook.com/whitehat/) for the safe
 - 80 character line length strongly preferred.
 - Prefer `'` over `"`.
 - ES6 syntax when possible.
-- Use [Flow types](http://flowtype.org/).
+- Use [TypeScript](https://www.typescriptlang.org/).
 - Use semicolons;
 - Trailing commas,
 - Avd abbr wrds.