fix: replace SYSTEMROOT with SYSDIR

[beyondkmp]

fix #8131

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🦋 Changeset detected

Latest commit: c5280eb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 8 packages

Name	Type
app-builder-lib	Patch
dmg-builder	Patch
electron-builder-squirrel-windows	Patch
electron-builder	Patch
electron-forge-maker-appimage	Patch
electron-forge-maker-nsis-web	Patch
electron-forge-maker-nsis	Patch
electron-forge-maker-snap	Patch

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[mmaietta]

Interesting, nice catch!

Looks like a test is failing with the changes though when compiling via docker TEST_FILES=protonTest pnpm test-linux

FAIL  src/protonTest.ts (40.249 s)
  ✓ linux (7412 ms)
  ✕ win (18135 ms)
  ✕ win ia32 (13049 ms)

    Processing script file: "<stdin>" (UTF8)
    warning 6000: unknown variable/constant "%SYSTEMROOT%\System32\cmd.exe"" detected, ignoring (macro:FIND_PROCESS:5)

[beyondkmp]

@mmaietta Fixed.