github newrelic/docs-website release-04.05.2023-18.04

🚀 What's new?

@marcusperezNR - Synthetics release notes ->
@marcusperezNR - Change description ->
@tabathadelane - chore: update download links to https ->
@tabathadelane - chore: update isNRDownload link check with https ->
@tabathadelane - Merge pull request #12485 from newrelic/tabatha/troubleshoot-download-links ->
@daffinito - feat(nrdiag): 2.4.2 release ->
@brnhensley - chore: add language identifiers for syntax highlighting ->
@rhetoric101 - Merge pull request #12486 from daffinito/daffi/nrdiag-242 ->
@rhetoric101 - Merge pull request #12487 from brnhensley/patch-32 ->
@rhetoric101 - Merge pull request #12488 from marcusperezNR/mperez/4-4-release-notes ->

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