removed uncessary quote (NomicFoundation#2025)

CONTRIBUTING.md

@@ -77,7 +77,7 @@ Hardhat and its plugins are optimized for keeping startup time low.
 This is done by selectively requiring dependencies when needed using `import` or `require` following this criteria:
 
 1. If something is only imported for its type, and NOT its value, use a top-level `import ... from "mod"`
-1. If a module is in the "Essential modules" list below, use a top-level `import ... from "mod""`.
+1. If a module is in the "Essential modules" list below, use a top-level `import ... from "mod"`.
 1. Otherwise, use `await import` or `require` locally in the functions that use it.
    1. If the function is sync, use node's `require`
    2. If the function is an async, use `await import`