fix: nsis-web target set APP_PACKAGE_URL_IS_INCOMPLETE

[geovie]

When specifying appPackageUrl in the NsisWebOptions config APP_PACKAGE_URL_IS_INCOMPLETE would not be set to null and thus the installer would not include the packages.

Now I'm not sure if APP_PACKAGE_URL_IS_INCOMPLETE is even needed or if the check in webPackage.nsh could even be removed.

[changeset-bot]

🦋 Changeset detected

Latest commit: a9a887d

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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[grovesNL]

This seems to cause an extra path to be appended to appPackageUrl, see #7732

Is this expected or is there a known workaround?