CI: Fix old reference to git.ostc-eu.org in README file

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

.gitlab-ci/container/bitbake-builder/README.md

@@ -5,7 +5,8 @@ SPDX-License-Identifier: Apache-2.0
 
 # Bitbake build container for Open Harmony OSTC
 
-This container encapsulates build dependencies for necessary to use repo and
-bitbake for Open Harmony from https://git.ostc-eu.org/
+This container encapsulates build dependencies necessary to use repo and bitbake
+for Open Harmony from
+https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/
 
 The default user is called builder, making usage of bitbake easier.