🤖 Bump the Pkg stdlib from 26918395 to 01e9121d

[DilumAluthgeBot]

Stdlib: Pkg
URL: https://github.com/JuliaLang/Pkg.jl
Branch: master
Old commit: 26918395
New commit: 01e9121d
Bump invoked by: @DilumAluthge
Powered by: BumpStdlibs.jl

$ git log --oneline 26918395..01e9121d
01e9121d Pkg test suite: do not try to write to or modify the directory containing the Pkg source code (#2803)
8028eea1 Pkg test suite: during the `subdir functionality` tests, use the correct absolute path when loading the `MainRepo` test package (#2804)
82663682 Pkg test suite: change an `old_depot_path = DEPOT_PATH` to `old_depot_path = copy(DEPOT_PATH)` (#2805)
59b3ba4b Point to help when command isn't recognized (#2811)
58234695 If `Base.DEPOT_PATH` is empty, `Pkg.PlatformEngines.get_server_dir` should return `nothing` (instead of erroring) (#2808)
7d83083a Delete the `test/testgroups` file (#2809)
880210e7 [CI] For now, disable the "Check Historical Stdlib Generator" CI check (#2812)
559113be 🤖 Update the list of historical stdlibs (#2801)
5d4fb23e Clarify example (#2798)
4361dfb2 docs: typo the -> them (#2796)
40595f60 [CI] Add a GitHub Actions workflow for updating the list of historical stdlibs (#2797)
f49edc8c Add a CI job that checks if the list of historical stdlibs needs to be updated (#2790)

[DilumAluthge]

Several of these are fixes that we'll need as part of #42853