CI: Update pluslib-repository to clone PR repo

Author: Sunderlandkyl

.github/workflows/ci.yml

@@ -116,7 +116,7 @@ jobs:
       pltools-access-token: ${{ secrets.PLTOOLS_ACCESS_TOKEN }}
     with:
       arch: ${{ matrix.arch }}
-      pluslib-repository: https://github.com/${{ github.repository }}.git
+      pluslib-repository: https://github.com/${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name || github.repository }}.git
       pluslib-tag: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
       vtk-cache-key: ${{ needs.update_vtk_x64.outputs.cache-key }}
       itk-cache-key: ${{ needs.update_itk_x64.outputs.cache-key }}
@@ -154,7 +154,7 @@ jobs:
       pltools-access-token: ${{ secrets.PLTOOLS_ACCESS_TOKEN }}
     with:
       arch: Win32
-      pluslib-repository: https://github.com/${{ github.repository }}.git
+      pluslib-repository: https://github.com/${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name || github.repository }}.git
       pluslib-tag: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
       vtk-cache-key: ${{ needs.update_vtk_Win32.outputs.cache-key }}
       itk-cache-key: ${{ needs.update_itk_Win32.outputs.cache-key }}
@@ -196,7 +196,7 @@ jobs:
       pltools-access-token: ${{ secrets.PLTOOLS_ACCESS_TOKEN }}
     with:
       arch: ${{ matrix.arch }}
-      pluslib-repository: https://github.com/${{ github.repository }}.git
+      pluslib-repository: https://github.com/${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name || github.repository }}.git
       pluslib-tag: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
       vtk-cache-key: ${{ needs.update_vtk_static_x64.outputs.cache-key }}
       itk-cache-key: ${{ needs.update_itk_static_x64.outputs.cache-key }}