Update readme.md (#70)

readme.md

@@ -59,6 +59,8 @@ Please open an issue if you use similar devices but still cannot achieve accepta
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 [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/lllyasviel/Fooocus/blob/main/colab.ipynb) | Fooocus Colab
 
+Note that sometimes this Colab will say like "you must restart the runtime in order to use newly installed XX". This can be safely ignored.
+
 Thanks to [camenduru](https://github.com/camenduru)'s codes!
 
 ### Linux