chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
DeterminateSystems/update-flake-lock	action	pinDigest	-> a2bbe02
actions/checkout	action	pinDigest	-> 08eba0b
cachix/install-nix-action	action	pinDigest	-> 08dcb3a
sean0x42/markdown-extract	action	pinDigest	-> 4178293
tweag/configure-bazel-remote-cache-auth	action	pinDigest	-> 144b0b9
tweag/run-nix-shell	action	pinDigest	-> 0d73770

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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[renovate]

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