Update dependency fluent-plugin-kubernetes_metadata_filter to v2.11.1

This MR contains the following updates:

Package	Type	Update	Change
fluent-plugin-kubernetes_metadata_filter	ironbank-rubygems	minor	2.10.0 -> 2.11.1
fluent-plugin-kubernetes_metadata_filter		minor	~> 2.10.0 -> ~> 2.11.0

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