Point at the correct `Dockerfile` for python (#7609) #506

Job	Run time
date-version	1s
Deploy (bundler, bundler)	26s
Deploy (cargo, cargo)	47s
Deploy (composer, composer)	50s
Deploy (docker, docker)	32s
Deploy (elm, elm)	29s
Deploy (git_submodules, gitsubmodule)	42s
Deploy (github_actions, github-actions)	26s
Deploy (go_modules, gomod)	44s
Deploy (gradle, gradle)	29s
Deploy (hex, mix)	38s
Deploy (maven, maven)	32s
Deploy (npm_and_yarn, npm)	44s
Deploy (nuget, nuget)	25s
Deploy (pub, pub)	36s
Deploy (python, pip)	13m 22s
Deploy (swift, swift)	1m 11s
Deploy (terraform, terraform)	25s
	23m 19s

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