mgr/dashboard: fix regression caused by bcc92ad

This PR intends to revert the changendone in requirements-test.tzt by PR
50643

Fixes: bcc92ad

Signed-off-by: Aashish Sharma <[email protected]>

Author: Aashish Sharma

src/pybind/mgr/dashboard/requirements-test.txt

@@ -1,4 +1,4 @@
 pytest-cov
 pytest-instafail
 pyfakefs==4.5.0
-jsonschema
+jsonschema==4.16.0