Fix spelling error

contrib/tracing/mempool_monitor.py

@@ -149,7 +149,7 @@ def handle_replaced(_, data, size):
     # buffer size of 32k on most machines. In practice, this size is insufficient:
     # Each `mempool:removed` event takes up 57 bytes in the buffer (32 bytes for txid,
     # 9 bytes for removal reason, and 8 bytes each for vsize and fee). Full blocks
-    # contain around 2k transactions, requring a buffer size of around 114kB. To cover
+    # contain around 2k transactions, requiring a buffer size of around 114kB. To cover
     # this amount, 32 4k pages are required.
     bpf["removed_events"].open_perf_buffer(handle_removed, page_cnt=32)
     bpf["rejected_events"].open_perf_buffer(handle_rejected)