scripts/Sync-Files.ps1 uses -Endpoint which is not a valid parameter of Invoke-GitHubAPI

[MariusStorhaug]

Bug

\scripts/Sync-Files.ps1\ calls \Invoke-GitHubAPI\ with -Endpoint:

\\powershell
Invoke-GitHubAPI -Method GET -Endpoint "/repos/.../pulls" ...
\\

The current PSModule/GitHub module has this parameter named -ApiEndpoint, not -Endpoint. PowerShell cannot resolve -Endpoint\ as a prefix abbreviation of -ApiEndpoint, so this throws at runtime:

A parameter cannot be found that matches parameter name 'Endpoint'

Fix options

1. Update this script to use -ApiEndpoint\ (immediate fix)
2. Wait for PSModule/GitHub #653 which adds -Endpoint\ as an alias (restores backward compat)

Affected lines

Three calls in \scripts/Sync-Files.ps1\ — the PR list GET, the PR create POST, and the label POST.