Fix connext references (bp #1266)

[mergify]

This is an automatic backport of pull request #1266 done by Mergify.

Cherry-pick of 1467f03 has failed:

On branch mergify/bp/dashing/pr-1266
Your branch is up to date with 'origin/dashing'.

You are currently cherry-picking commit 1467f03.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   source/Concepts/About-Internal-Interfaces.rst
	modified:   source/Concepts/About-Middleware-Implementations.rst
	modified:   source/Contributing/Developer-Guide.rst
	modified:   source/Feature-Ideas.rst
	modified:   source/Features.rst
	modified:   source/Tutorials/Building-ROS-2-on-Linux-with-Eclipse-Oxygen.rst
	modified:   source/Tutorials/Quality-of-Service.rst

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   source/Concepts/About-Different-Middleware-Vendors.rst
	both modified:   source/Guides/Working-with-multiple-RMW-implementations.rst
	both modified:   source/Installation/Linux-Install-Binary.rst

To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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