docs: fix unclosed link in Test Runner documentation

Fixes an unclosed link tag that causes all text after it to be
underlined and clickable in the HTML documentation.

Before: [<RegExp>]
After: [RegExp]

Author: KJyang-0114

doc/api/test.md

@@ -288,10 +288,10 @@ it('should do the thing', { expectFailure: 'feature not implemented' }, () => {
 ```
 
 If the value of `expectFailure` is a
-[<RegExp>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) |
-[<Function>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function) |
-[<Object>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object) |
-[<Error>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error),
+[RegExp](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) |
+[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function) |
+[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object) |
+[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error),
 the tests will pass only if they throw a matching value.
 See [`assert.throws`][] for how each value type is handled.