fix(Release notes): Added extension to the file and links

src/content/docs/release-notes/infrastructure-release-notes/infrastructure-agent-release-notes/new-relic-infrastructure-agent-1422.mdx

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+---
+subject: Infrastructure agent
+releaseDate: '2023-06-01'
+version: 1.42.2
+---
+
+A new version of the agent has been released. Follow standard procedures to [update the Infrastructure agent](/docs/infrastructure/install-configure-manage-infrastructure/update-or-uninstall/update-infrastructure-agent).
+
+We recommend that you upgrade the agent regularly and at a minimum every 3 months. As of this release, the oldest supported version is [Infrastructure agent 1.27.0](/docs/release-notes/infrastructure-release-notes/infrastructure-agent-release-notes/new-relic-infrastructure-agent-1270).
+
+## Added
+Support Fluent Bit Use_ANSI flag in [#1661](https://github.com/newrelic/infrastructure-agent/pull/1661).
+
+## Changed
+Bump nri-flex version to 1.8.5 in [#1668](https://github.com/newrelic/infrastructure-agent/pull/1668).
+Bump nri-prometheus version to 2.18.1 in [#1665](https://github.com/newrelic/infrastructure-agent/pull/1665).
+Bump nri-docker version to 1.8.4 in [#1660](https://github.com/newrelic/infrastructure-agent/pull/1660).
+
+## Fixed
+msi checks performed before creating agent data directory in [#1635](https://github.com/newrelic/infrastructure-agent/pull/1635).