Fix typo in JestPlatform.md (#9212)

Closes #9122

Author: juffalow

docs/JestPlatform.md

@@ -119,7 +119,7 @@ You can read more about `jest-validate` in the [readme file](https://github.com/
 
 ## jest-worker
 
-Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they where class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
+Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they were class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
 
 ### Example
 

website/versioned_docs/version-22.x/JestPlatform.md

@@ -120,7 +120,7 @@ You can read more about `jest-validate` in the [readme file](https://github.com/
 
 ## jest-worker
 
-Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they where class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
+Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they were class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
 
 ### Example
 

website/versioned_docs/version-24.0/JestPlatform.md

@@ -120,7 +120,7 @@ You can read more about `jest-validate` in the [readme file](https://github.com/
 
 ## jest-worker
 
-Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they where class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
+Module used for parallelization of tasks. Exports a class `Worker` that takes the path of Node.js module and lets you call the module's exported methods as if they were class methods, returning a promise that resolves when the specified method finishes its execution in a forked process.
 
 ### Example