fix: supertokens-root branch

Author: sattvikc

.github/workflows/publish-dev-docker.yml

@@ -43,7 +43,7 @@ jobs:
         with:
           repository: supertokens/supertokens-root
           path: ./supertokens-root
-          ref: master
+          ref: for_jdk_15_releases
       - uses: actions/checkout@v2
         with:
           path: ./supertokens-root/supertokens-core