[actions] update workbench docker version to v0.2.7 (#24)

Co-authored-by: jt14den <52725+jt14den@users.noreply.github.com>

Author: github-actions[bot]

.github/workbench-docker-version.txt

@@ -1 +1 @@
-v0.2.6
+v0.2.7