Fix to detect `venv` with `pipenv` installed in it as `pipenv` enviro… #1101

Job	Run time
Tests (macos-14, aarch64-apple-darwin, yes)	11m 47s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	8m 48s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 14s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	3m 16s
Tests (macos-latest, x86_64-apple-darwin, yes)	14m 45s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	6m 58s
Builds (windows-latest, x86_64-pc-windows-msvc)	3m 12s
Builds (windows-latest, aarch64-pc-windows-msvc)	3m 24s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	1m 47s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 5s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 44s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 26s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 41s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	7m 6s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	4m 53s
Builds (macos-latest, x86_64-apple-darwin, yes)	2m 59s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	4m 12s
	1h 27m 17s

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