Update image_pull_policy.md

Package Owner Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-operator/-/merge_requests/31

https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-operator/-/merge_requests/32

https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/twistlock/-/merge_requests/40

Closes #908 (closed)

Closes #910 (closed)