core/txpool/blobpool: fix error message (#30247)

the validation process only checks for 'less than', which is
inconsistent with the error output

core/txpool/blobpool/blobpool.go

@@ -1155,11 +1155,11 @@ func (p *BlobPool) validateTx(tx *types.Transaction) error {
 		)
 		switch {
 		case tx.GasFeeCapIntCmp(minGasFeeCap.ToBig()) < 0:
-			return fmt.Errorf("%w: new tx gas fee cap %v <= %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.GasFeeCap(), prev.execFeeCap, p.config.PriceBump)
+			return fmt.Errorf("%w: new tx gas fee cap %v < %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.GasFeeCap(), prev.execFeeCap, p.config.PriceBump)
 		case tx.GasTipCapIntCmp(minGasTipCap.ToBig()) < 0:
-			return fmt.Errorf("%w: new tx gas tip cap %v <= %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.GasTipCap(), prev.execTipCap, p.config.PriceBump)
+			return fmt.Errorf("%w: new tx gas tip cap %v < %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.GasTipCap(), prev.execTipCap, p.config.PriceBump)
 		case tx.BlobGasFeeCapIntCmp(minBlobGasFeeCap.ToBig()) < 0:
-			return fmt.Errorf("%w: new tx blob gas fee cap %v <= %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.BlobGasFeeCap(), prev.blobFeeCap, p.config.PriceBump)
+			return fmt.Errorf("%w: new tx blob gas fee cap %v < %v queued + %d%% replacement penalty", txpool.ErrReplaceUnderpriced, tx.BlobGasFeeCap(), prev.blobFeeCap, p.config.PriceBump)
 		}
 	}
 	return nil