[CI] Issue with Windows Testing

[mmcky]

Describe the bug

context

There is currently an issue with scheduled windows testing of the docs build with relative references in references/_changelog.md which is important the CHANGELOG.md file from the root level.

bug

D:\a\jupyter-book\jupyter-book\CHANGELOG.md:194: WARNING: 'myst' reference target not found: ..\structure\toc.md
[208](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:208)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:277: WARNING: 'myst' reference target not found: ..\customize\config.md
[209](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:209)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:278: WARNING: 'myst' reference target not found: ..\customize\config.md
[210](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:210)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:279: WARNING: 'myst' reference target not found: ..\advanced\sphinx.md
[211](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:211)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:284: WARNING: 'myst' reference target not found: ..\start\build.md
[212](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:212)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:289: WARNING: 'myst' reference target not found: ..\advanced\pdf.md
[213](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:213)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:368: WARNING: 'myst' reference target not found: ..\start\build.md
[214](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:214)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:380: WARNING: 'myst' reference target not found: ..\content\math.md
[215](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:215)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:393: WARNING: 'myst' reference target not found: ..\advanced\windows.md
[216](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:216)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:410: WARNING: 'myst' reference target not found: ..\content\content-blocks.md
[217](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:217)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:411: WARNING: 'myst' reference target not found: ..\content\figures.md
[218](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:218)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:413: WARNING: 'myst' reference target not found: ..\content\content-blocks.md
[219](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:219)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:414: WARNING: 'myst' reference target not found: ..\content\math.md
[220](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:220)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:418: WARNING: 'myst' reference target not found: ..\file-types\jupytext.Rmd
[221](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:221)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:432: WARNING: 'myst' reference target not found: ..\content\execute.md
[222](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:222)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:435: WARNING: 'myst' reference target not found: ..\content\code-outputs.md
[223](https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true#step:7:223)
D:\a\jupyter-book\jupyter-book\CHANGELOG.md:445: WARNING: 'myst' reference target not found: ..\content\content-blocks.md

problem

Failing on windows only. osx and linux or ok.

Reproduce the bug

https://github.com/executablebooks/jupyter-book/runs/6315624418?check_suite_focus=true

List your environment

No response