Update README.md

Author: RunzhouHan

README.md

@@ -92,7 +92,7 @@ Note: ```HDF5_VOL_CONNECTOR``` contains the original provenance file (plain text
 ```
 You may compare the default plain text provenance file generated by vol-connector with the RDF provenance file generated by PROV-IO.  <br />
 
-More provenance traces track from real workflows in paper are provided at: https://github.com/hpc-io/prov-io/tree/master/example_provenance.
+More provenance traces tracked from real workflows in paper are provided at: https://github.com/hpc-io/prov-io/tree/master/example_provenance.
 
 
 ### PROV-IO Syscall Wrapper