Update README.md

Author: txtatech

README.md

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 # d2r-handler
 Batch scripts for Diablo II: Resurrected  to close the "DiabloII Check For Other Instances" handle and set the process priority of D2R.exe
+
+**Required Dependency:**
+
+These scripts require handle64.exe to be in the same directoy as they are.
+You can find handle64 here: https://docs.microsoft.com/en-us/sysinternals/downloads/handle
+
+**Usage:**
+
+Launch D2R-Handler.bat and select and option.