chore(deps): update bcgov/action-builder-ghcr action to v4 (#2031)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pr-open.yml

@@ -22,7 +22,7 @@ jobs:
       matrix:
         package: [backend, frontend, oracle-api]
     steps:
-      - uses: bcgov/action-builder-ghcr@ec30e4ce1ac3c25c93ec26cf370ecba028dc478e # v3.0.1
+      - uses: bcgov/action-builder-ghcr@fd17bc1cbb16a60514e0df3966d42dff9fc232bc # v4.0.0
         id: build
         with:
           package: ${{ matrix.package }}