refine README content

Author: lonng

README.md

@@ -224,7 +224,7 @@ Any contribution that can help improve this list and make it more comprehensive
 
 ### Execution Engine
 
-- [Querye Valuation Techniques For Large Databases](https://dl.acm.org/doi/pdf/10.1145/152610.152611) (1993) - Graefe G.
+- [Querye Valuation Techniques For Large Databases](papers/execution-engine/query-evaluation-techniquesfor-large-databases.pdf) (1993) - Graefe G.
 - [Volcano - An Extensible And Parallel Query Evaluation System](papers/execution-engine/volcano---an-extensible-and-parallel-query-evaluation-system.pdf) (1994) - Graefe, Goetz.
 - [Monetdb/X100: Hyper-Pipelining Query Execution](https://www.researchgate.net/profile/Niels-Nes/publication/45338800_MonetDBX100_Hyper-Pipelining_Query_Execution/links/0deec520cd1e8a3607000000/MonetDB-X100-Hyper-Pipelining-Query-Execution.pdf) (2005) - Boncz, Peter A., Marcin Zukowski, and Niels Nes.
 - [Efficiently Compiling Efficient Query Plans For Modern Hardware](https://dl.acm.org/doi/pdf/10.14778/2002938.2002940) (2011) - Neumann, Thomas.