Add grintor-hooks to all-repos.yaml

[grintor]

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Added grintor-hooks repo to all-repos.yaml

[grintor]

Hello,

I would like to add my hooks to your list of repos supporting pre-commit. One hook is a python port of the official AWS secrets detection bash script. The other is a tool for scanning for missing python dependencies in the requirements.txt file.

Thank you for your consideration, Chris