Fix adding "Ignore" label to new release PRs

tools/ReleaseTools.psm1

@@ -365,13 +365,9 @@ function New-ReleasePR {
         git push origin $Branch
     }
 
-    $LabelParams = @{
-        OwnerName      = "PowerShell"
-        RepositoryName = $RepositoryName
-        Label          = "Ignore"
-    }
+    $Repo = Get-GitHubRepository -OwnerName PowerShell -RepositoryName $RepositoryName
 
-    $PRParams = @{
+    $Params = @{
         Head    = $Branch
         Base    = "master"
         Draft   = $true
@@ -381,9 +377,13 @@ function New-ReleasePR {
         Confirm = $ConfirmPreference
     }
 
-    $PR = Get-GitHubLabel @LabelParams | New-GitHubPullRequest @PRParams
+    $PR = $Repo | New-GitHubPullRequest @Params
     Write-Host "Draft PR URL: $($PR.html_url)"
 
+    # NOTE: The API is weird. According to GitHub, all PRs are Issues, so this
+    # works, but the module doesn't support it as easily as it could.
+    $Repo | Add-GitHubIssueLabel -Issue $PR.PullRequestNumber -LabelName "Ignore"
+
     Pop-Location
 }