Fix library dependency of sdl on 3.23

[at-wat]

sdl12-compat-dev is used for sdl rosdep key since 3.23 but the actual library sdl2 should be also installed to add a runtime dependency.

[github-actions]

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For changes related to yamllint:

• ✅ All new lines of YAML pass linter checks

[github-actions]

For changes related to yamllint:

• ✅ All new lines of YAML pass linter checks

[f-fl0]

LGTM