K8SPSMDB-969 - Update cert manager version in E2E tests (#1326)

Author: tplavcic

e2e-tests/functions

@@ -16,7 +16,7 @@ SKIP_BACKUPS_TO_AWS_GCP_AZURE=${SKIP_BACKUPS_TO_AWS_GCP_AZURE:-1}
 PMM_SERVER_VER=${PMM_SERVER_VER:-"9.9.9"}
 IMAGE_PMM_SERVER_REPO=${IMAGE_PMM_SERVER_REPO:-"perconalab/pmm-server"}
 IMAGE_PMM_SERVER_TAG=${IMAGE_PMM_SERVER_TAG:-"dev-latest"}
-CERT_MANAGER_VER="1.12.3"
+CERT_MANAGER_VER="1.12.4"
 tmp_dir=$(mktemp -d)
 sed=$(which gsed || which sed)
 date=$(which gdate || which date)