core/txpool: fix duplicate function comment (ethereum#32524)

Author: keeghcet

core/txpool/blobpool/blobpool_test.go

@@ -262,8 +262,8 @@ func makeUnsignedTx(nonce uint64, gasTipCap uint64, gasFeeCap uint64, blobFeeCap
 	return makeUnsignedTxWithTestBlob(nonce, gasTipCap, gasFeeCap, blobFeeCap, rnd.Intn(len(testBlobs)))
 }
 
-// makeUnsignedTx is a utility method to construct a random blob transaction
-// without signing it.
+// makeUnsignedTxWithTestBlob is a utility method to construct a random blob transaction
+// with a specific test blob without signing it.
 func makeUnsignedTxWithTestBlob(nonce uint64, gasTipCap uint64, gasFeeCap uint64, blobFeeCap uint64, blobIdx int) *types.BlobTx {
 	return &types.BlobTx{
 		ChainID:    uint256.MustFromBig(params.MainnetChainConfig.ChainID),