fix: change constraints

Author: jignaciopm

requirements/constraints.txt

@@ -8,8 +8,10 @@
 # pin when possible.  Writing an issue against the offending project and
 # linking to it here is good.
 
-
-# Common constraints for Open edX repos
-#-c https://raw.githubusercontent.com/openedx/edx-lint/master/edx_lint/files/common_constraints.txt
-
+# using LTS django version
 Django<5.3
+
+# elasticsearch>=7.14.0 includes breaking changes in it which caused issues in discovery upgrade process.
+# elastic search changelog: https://www.elastic.co/guide/en/enterprise-search/master/release-notes-7.14.0.html
+# See https://github.com/openedx/edx-platform/issues/35126 for more info
+elasticsearch<7.14.0