Spec

Deduplicate `Invite3pid` #3449

Job	Run time
🔎 Check Event schema examples	12s
🔎 Validate OpenAPI specifications	19s
⚙️ Calculate baseURL for later jobs	1s
🔎 Check OpenAPI definitions examples	20s
🔎 Check JSON Schemas inline examples	12s
📢 Run towncrier for changelog	8s
🐍 Build OpenAPI definitions	18s
📖 Build the spec	42s
📖 Build the historical backup spec	0s
🔎 Validate generated HTML	7s
	2m 19s

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