add credit

README.md

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 # t8-custom-ee
 A tool to allow EEs in local or custom mutation in Black Ops 4
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+Load the zombies mode and press "Inject mod", you can remove the mod using "Reverse mod".
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+This mod is using the knowledge of the [t8-compiler by Serious](https://github.com/shiversoftdev/t7-compiler), it replaces the `function_e51dc2d8`'s bytecode to `return true` to enable step EEs even if you are in casual, local or custom mutation.
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+This mod is a temp modification knowing the detour API isn't available for Black ops 4 in the t8-compiler.