github newrelic/docs-website release-10.26.2021-15.01

🚀 What's new?

@planteater - Update What Is CS and more ->
@planteater - Type and wrong gif ->
@planteater - More tweaks ->
@founddrama - fix(Alerts): Amended incorrect/duplicate id in Collapser in customize-your-webhook-payload ->
@zuluecho9 - fix(home page): add back 'what's new' ->
@paperclypse - fix(CodeStream): Minor edits ->
@paperclypse - fix(CodeStream): Moved images to the correct folder ->
@rhetoric101 - Merge pull request #4544 from founddrama/fix/webhook_anchors ->
@paperclypse - fix(CodeStream): Clarify when we're talking about New Relic One ->
@zuluecho9 - fix(alerts): adding back capital A 'Alerts' ->
@zuluecho9 - Merge pull request #4546 from newrelic/Few-changes ->
@paperclypse - Merge pull request #4535 from planteater/feature/whatiscs ->

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