Update README.md

Author: dubbyOW

README.md

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 # NVIDIA GPU Shader Cache Cleaner
  .cmd script to easily wipe NVIDIA GPU shader cache
+.cmd script to easily wipe GPU shader cache, requires IObit Unlocker installed (https://www.iobit.com/en/iobit-unlocker.php)
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+It's free and has full functionality for all NVIDIA GPUs.
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+All installation and deletion paths can be easily customized in a notepad.
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+To download .cmd file, right click on Clear Shader Cache.cmd then choose "Save link as".
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+Run as admin.