Fix extra H1 headings and retitle the Machines API overview - #2574

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Fetched config files from 3 sources
Fetched and validated config files from 3 sources
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Merged navigation from 3 git sources
Fetched all file paths
Fetched 2 OpenApi file(s):
  - api/machines/openapi.json
  - sprites/api/openapi.json
Fetched 1 AsyncApi file(s):
  - sprites/api/asyncapi.json
Generated OpenAPI pages for navigation
Generated AsyncAPI pages for navigation
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Persisted 151 generated API page(s)
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Successfully updated API reference metadata.
Updating all paths...
Successfully updated deployment
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Updating navigation...
Navigation updated
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