Update Configurable-REPL.md

Author: coke

solutions/rakudo/Configurable-REPL.md

@@ -42,7 +42,7 @@ defaulting to `%T` if a bare `\t` is used.
 |--|--|
 | `%T` | `%H:%M:%S` |
 | `%R` | `%H:%M` |
-| `%H` | 24-Hour hours, 2 digits |
+| `%H` | 24-hour hours, 2 digits |
 | `%I` | 12-hour hours, 2 digits |
 | `%M` | minutes, 2 digits |
 | `%S` | seconds, 2 digits |