Migrate deprecated summary tag #14754

Job	Run time
Build and check documentation	3m 40s
End-to-end tests, chromium	13m 32s
Set up docker build 'dynamic' env variables	1s
End-to-end tests, firefox	17m 28s
End-to-end tests, webkit	12m 6s
Run the Django test suite	8m 29s
Run the Django test suite in reverse	5m 41s
docker_build (production) / Build image	3m 12s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	2m 48s
Scan docker image	2m 4s
Simulate upgrading instances (2.7.4)	1m 29s
Simulate upgrading instances (2.7.8)	1m 29s
Check for unexepected OAS changes	5s
Validate OAS	17s
Generate SDKs from OAS	36s
Generate Postman collection from OAS	13s
Push Docker image	0s
update-docker-readme	0s
	1h 13m 10s

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