fix: Fix grayrelease strategy workloads info
Created by: leoendless
Signed-off-by: leoliu leoliu@yunify.com
What type of PR is this?
/kind bug
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #https://github.com/kubesphere/kubesphere/issues/3128
Special notes for reviewers:
Additional documentation, usage docs, etc.: