fix: typographical error :bug:

run-selfhosted.js

@@ -29,7 +29,7 @@ const surrounding_box = (col, lines) => {
     // Keeping track of WHY certain versions don't work
     const ver_info = [
         { under: 14, reasons: ['optional chaining is not available'] },
-        { under: 16, reasons: ['diskusage package ABI mismatch'] },
+        { under: 16, reasons: ['disk usage package ABI mismatch'] },
     ];
 
     const lowest_allowed = Math.max(...ver_info.map(r => r.under));