Add release notes for 1.3.7
openshift/openshift-docs#45076: RHDEVDOCS-4032 - Added release notes for 1.3.7
openshift/openshift-docs#45569: [enterprise-4.9] RHDEVDOCS-4032 - Added release notes for 1.3.7
openshift/openshift-docs#45570: [enterprise-4.10] RHDEVDOCS-4032 - Added release notes for 1.3.7
openshift/openshift-docs#45574: [enterprise-4.11] RHDEVDOCS-4032 - Added release notes for 1.3.7