impr(quotes): add English quote (@MythicalWillbur) (monkeytypegame#7192)

### Description

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Added a quote in English from When Breath Becomes Air as I like the
book.

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Co-authored-by: Miodec <[email protected]>

Author: MythicalWillbur

frontend/static/quotes/english.json

@@ -39099,6 +39099,12 @@
       "source": "Heart of Darkness",
       "id": 7729,
       "length": 362
+    },
+    {
+      "text": "You can’t ever reach perfection, but you can believe in an asymptote toward which you are ceaselessly striving.",
+      "source": "When Breath Becomes Air",
+      "id": 7730,
+      "length": 111
     }
   ]
 }