Remove repeated "can" in lambda-list concept introduction

[link2xt]

No description provided.

[github-actions]

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[verdammelt]

@link2xt please use configlet to generate the exercise files affected by this change.

./bin/fetch-configlet
./bin/configlet

and then you can commit the modified files (which should have this same change applied to them as the files were re-generated...)

Thanks.

[link2xt]

Committed, had to run ./bin/configlet generate, just ./bin/configlet prints help.

[verdammelt]

Committed, had to run ./bin/configlet generate, just ./bin/configlet prints help.

Whoops! I gave bad directions! Glad you figured it out.