Bug 1898565 - [bidi] Add quotes in message for invalid header value i…

…n network.continueRequest r=webdriver-reviewers,jgraham

Depends on D210518

Differential Revision: https://phabricator.services.mozilla.com/D211414

remote/webdriver-bidi/modules/root/network.sys.mjs

@@ -511,7 +511,7 @@ class NetworkModule extends Module {
         )(deserializedHeader[0]);
         lazy.assert.that(
           value => this.#isValidHeaderValue(value),
-          `Expected header value to be a valid header value, got ${deserializedHeader[1]}`
+          `Expected "header" value to be a valid header value, got ${deserializedHeader[1]}`
         )(deserializedHeader[1]);
         deserializedHeaders.push(deserializedHeader);
       }