chore: update publish variables

Signed-off-by: Sarah Christoff <28318173+schristoff@users.noreply.github.com>

Author: schristoff

.github/workflows/build_pipelinesrelease_template.yml

@@ -92,7 +92,7 @@ jobs:
       shell: bash
   Validate-integration_test:
     env:
-      GHCR_IOGETPORTER_DOCKER_REGISTRY: https://ghcr.io
+      GHCR_IOGETPORTER_DOCKER_REGISTRY: https://ghcr.io/getporter
       GHCR_IOGETPORTER_DOCKER_USERNAME: getporterbot
     name: Integration Test
     needs:
@@ -170,8 +170,8 @@ jobs:
       run: mage PublishPorter PublishMixins
   Publish-publish_docker:
     env:
-      DOCKER_REGISTRY:
-      DOCKER_USERNAME:
+      DOCKER_REGISTRY: https://ghcr.io/getporter
+      DOCKER_USERNAME: getporterbot
     name: Publish Docker Images
     needs:
     - Validate-build