github newrelic/docs-website release-12.13.2021-18.09

🚀 What's new?

@paperclypse - feat(APM/CodeStream): Add links to CodeStream env variables ->
@austin-schaefer - chore(mobile apps): Remove duplicate paragraph ->
@jaffinito - chore: Updates supported versions of .NET Agent NServiceBus ->
@paperclypse - fix(APM/CodeStream): Fixed missing link, removed Ruby ->
@jaffinito - Swap out to DT from CAT ->
@meiao - chore: java-agent adding more info on supported java versions on necent release notes ->
@austin-schaefer - Merge pull request #5275 from newrelic/austin-schaefer-patch-4 ->
@rhetoric101 - Merge pull request #5280 from meiao/aonuki/java-release-notes-update ->
@paperclypse - Merge pull request #5276 from newrelic/doc-7574-codestream-env-variables ->
@rhetoric101 - fix(dot-net): use workaround to format messaging collapser ->
@rhetoric101 - Merge pull request #5278 from jaffinito/postgres67-dotnet ->
@meiao - chore: java-agent - rectifying mitigation procedures ->
@rhetoric101 - Merge pull request #5283 from meiao/java-mitigation-update ->

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