[doc] Add instructions to upgrade DEE CMake externals

[tyler-yankee]

Towards RobotLocomotion/drake-external-examples#432 (see also: RobotLocomotion/drake-external-examples#459).

---

This change is 

[tyler-yankee]

-(status: do not merge) -(status: do not review) +a:@Aiden2244 for feature review, please.

Reviewable status: LGTM missing from assignee Aiden2244, needs platform reviewer assigned, needs at least two assigned reviewers, labeled "do not merge" (waiting on @tyler-yankee)

[Aiden2244]

, barring nits.

Reviewable status: 2 unresolved discussions, needs platform reviewer assigned, needs at least two assigned reviewers

---

-- commits line 2 at r1:
nit "DEE packages" is a little vague to me, I might suggest "...upgrade DEE CMake externals" to be a little more specific and match the naming used in the new python script.

---

tools/workspace/README.md line 198 at r1 (raw file):

process.

The packages are listed in Drake's `MODULE.bazel`, and the corresponding user-

nit at the risk of being overly pedantic, "user-provided" should be newlined as a single word to avoid an erroneous space after the hyphen when this text is rendered on GitHub.

[tyler-yankee]

thanks!

Possibly +a:@jwnimmer-tri would have more context on this PR for platform than regular on-call? Feel free to delegate as needed.

Reviewable status: LGTM missing from assignee jwnimmer-tri(platform)

---

-- commits line 2 at r1:

Previously, Aiden2244 (Aiden McCormack) wrote…

nit "DEE packages" is a little vague to me, I might suggest "...upgrade DEE CMake externals" to be a little more specific and match the naming used in the new python script.

done

---

tools/workspace/README.md line 198 at r1 (raw file):

Previously, Aiden2244 (Aiden McCormack) wrote…

nit at the risk of being overly pedantic, "user-provided" should be newlined as a single word to avoid an erroneous space after the hyphen when this text is rendered on GitHub.

done

[jwnimmer-tri]

@jwnimmer-tri reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: 1 unresolved discussion

---

tools/workspace/README.md line 198 at r2 (raw file):

process.

The packages are listed in Drake's `MODULE.bazel`, and the corresponding

BTW This sentence could probably be more precise that thedrake/MODULE.bazel are the canonical versions (and drake_cmake_external/CMakeLists.txt are the derivative versions that should follow along).

[tyler-yankee]

Reviewable status: 1 unresolved discussion

---

tools/workspace/README.md line 198 at r2 (raw file):

Previously, jwnimmer-tri (Jeremy Nimmer) wrote…

BTW This sentence could probably be more precise that thedrake/MODULE.bazel are the canonical versions (and drake_cmake_external/CMakeLists.txt are the derivative versions that should follow along).

I think I simplified while adding the clarification you were looking for, lmk your thoughts.

[jwnimmer-tri]

@jwnimmer-tri reviewed 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all discussions resolved, LGTM from assignees jwnimmer-tri(platform),Aiden2244

---

tools/workspace/README.md line 198 at r2 (raw file):

Previously, tyler-yankee (Tyler Yankee) wrote…

I think I simplified while adding the clarification you were looking for, lmk your thoughts.

Definitely better.