Update gems

This MR contains the following updates:

Package	Type	Update	Change
fluent-plugin-elasticsearch	ironbank-rubygems	patch	5.1.2 -> 5.1.4
mime-types	ironbank-rubygems	minor	3.3.1 -> 3.4.1
mime-types-data	ironbank-rubygems	patch	3.2021.0901 -> 3.2021.1115

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