chore: add 3.5.5 schema and update SCHEMAS.md

3.5.5 schema adds the charm-rev field to ApplicationStatus, but there
are no changes to the generated code because this field is present in
the 3.6.0 schema that was previously added

Author: james-garner-canonical

juju/client/SCHEMAS.md

@@ -39,3 +39,7 @@ Please see docs/CONTRIBUTING.md for the process for updating this file.
 3.5.2 (identical to 3.5.0)
 3.5.3 (identical to 3.5.0)
 3.5.4 (identical to 3.5.0)
+3.5.5
+
+# 3.6
+3.6.0