bump diego-datadog-templates submodule
bump diego-datadog-templates submodule

[#150244425]

Signed-off-by: Chris Piraino <f047703f03f13cc8e1b226aa8ba85c2dfc238f94@pivotal.io>

pivotal-cf-experimental/datadog-config-oss,pivotal-cf-experimental/datadog-config-oss