Fix broken build

Use fixed version of bundler (2.3.26)

Signed-off-by: Vasyl Razinkov <vasyl.razinkov@est.tech>
Change-Id: I0e62db76e00b9b8932eca4a700db9c89e7e31c17
Issue-ID: SDC-4314
diff --git a/openecomp-be/dist/sdc-onboard-db-init-docker/artifacts/Dockerfile b/openecomp-be/dist/sdc-onboard-db-init-docker/artifacts/Dockerfile
index 371c977..ce5fc02 100644
--- a/openecomp-be/dist/sdc-onboard-db-init-docker/artifacts/Dockerfile
+++ b/openecomp-be/dist/sdc-onboard-db-init-docker/artifacts/Dockerfile
@@ -25,6 +25,7 @@
     gem install public_suffix -v 4.0.7 --no-document && \
     gem install multipart-post -v 2.2.0 --no-document && \
     gem install etc -v 1.3.0 --no-document && \
+    gem install bundler -v 2.3.26 --no-document && \
     gem install chef:13.8.5 berkshelf:6.3.1 io-console:0.4.6 webrick --no-document && \
     apt-get update -y && apt-get remove bash -y --allow-remove-essential && \
     apt-get install -y binutils && apt-get clean && gem cleanup