fix regex for triggering test deploy via git tag

ci/build.template.yml

@@ -18,7 +18,7 @@
         - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
           variables:
             IMAGE_TAG: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
-        - if: '$CI_COMMIT_TAG =~ /^end-of-sprint\/[0-9]+/'
+        - if: '$CI_COMMIT_TAG =~ /^end-of-sprint-[0-9]+/'
           variables:
             IMAGE_TAG: $CI_COMMIT_TAG
             # override DEPLOY_ENV