[release] Add --no-upgrade to pip-compile args

[andrew-anyscale]

Pass --no-upgrade to pip-compile so that regenerating the lockfile only
changes packages that are strictly required by .in file edits, avoiding
incidental upgrades of unrelated transitive dependencies.

Topic: fix-requirements-update-3
Relative: remove-pygithub-ci
Signed-off-by: andrew andrew@anyscale.com

[andrew-anyscale]

Reviews in this chain:
└#61767 [release] Add GitHubClient: pull request support
　└#61768 [release] Add GitHubClient: issue support
　　└#61710 [release] Replace PyGithub with GitHubClient in ray_release
　　　└#61711 [ci] Replace PyGithub with GitHubClient in get_contributors.py
　　　　└#61770 [release] Add --no-upgrade to pip-compile args
　　　　　└#61712 [release] Remove PyGithub from requirements

[andrew-anyscale]

#	head	base	diff	date	summary
0	f9d1322e	1772209e	diff	Mar 16 12:41 PM	1 file changed, 1 insertion(+)
1	e7895600	4dfdcd3d	rebase	Mar 16 12:47 PM	0 files changed
2	794fe424	1775a02b	rebase	Mar 16 15:17 PM	0 files changed
3	27deb807	f2f15d7f	rebase	Mar 16 17:22 PM	0 files changed

[gemini-code-assist]

Code Review

This pull request adds the --no-upgrade flag to the pip-compile arguments in release/BUILD.bazel. This is a good practice that prevents pip-compile from upgrading all packages when regenerating the lockfile, instead only updating dependencies that are strictly necessary due to changes in the .in file. This enhances dependency stability and makes updates more predictable. The change is correct and achieves its stated goal. I have no further comments.