impr(quotes): add English quote (@Zev18) (monkeytypegame#6188)

### Description

Added an english quote.

### Checks

- [x] Adding quotes?
- [x] Make sure to include translations for the quotes in the
description (or another comment) so we can verify their content.
- [x] Check if any open issues are related to this PR; if so, be sure to
tag them below.
- [x] Make sure the PR title follows the Conventional Commits standard.
(https://www.conventionalcommits.org for more info)
- [x] Make sure to include your GitHub username prefixed with @ inside
parentheses at the end of the PR title.

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Author: Zev18

frontend/static/quotes/english.json

@@ -38571,6 +38571,12 @@
       "source": "DanMachi",
       "length": 165,
       "id": 7632
+    },
+    {
+      "text": "Have faith in what you can't explain. Believe in what you can no longer deny.",
+      "source": "Doctor Fate, Young Justice",
+      "length": 77,
+      "id": 7633
     }
   ]
 }