CI: address the bug with .env (#8404)

substrate/.gitlab-ci.yml

@@ -519,6 +519,10 @@ build-rust-doc:
     - buildah info
     - buildah push --format=v2s2 "$IMAGE_NAME:$VERSION"
     - buildah push --format=v2s2 "$IMAGE_NAME:latest"
+    # pass artifacts to the trigget-simnet job
+    - echo "VERSION=${VERSION}" > artifacts/${PRODUCT}/build.env
+    - echo "TRIGGERER=${CI_PROJECT_NAME}" >> artifacts/${PRODUCT}/build.env
+  after_script:
     - buildah logout "$IMAGE_NAME"
 
 publish-docker-substrate:
@@ -530,8 +534,6 @@ publish-docker-substrate:
   variables:
     <<:                            *docker-build-vars
     PRODUCT:                       substrate
-  after_script:
-    - echo "VERSION=${VERSION}" >> build.env
   artifacts:
     reports:
       # this artifact is used in trigger-simnet job