doc: simplify recommendation in webcrypto.md

PR-URL: #42554
Reviewed-By: Mestery <[email protected]>
Reviewed-By: Tierney Cyren <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Akhil Marsonya <[email protected]>

Author: Trott

doc/api/webcrypto.md

@@ -1020,7 +1020,7 @@ added: v15.0.0
 * Type: {ArrayBuffer|TypedArray|DataView|Buffer}
 
 The initialization vector must be unique for every encryption operation
-using a given key. It is recommended by the AES-GCM specification that
+using a given key. The AES-GCM specification recommends that
 this contain at least 12 random bytes.
 
 #### `aesGcmParams.name`