fix: use ColourInfo == Colour4 comparison in TestSceneHyperDashColour… #2589

Job	Run time
Build only (iOS)	4m 58s
Resource Budget (Source Overrides)	33s
Test (Windows, windows-2025-vs2026, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debu...	14m 53s
Code Quality	4m 56s
Test (Linux, ubuntu-latest, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tests.dll o...	31m 57s
Test (Windows, windows-2025-vs2026, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tes...	42m 44s
Test (Linux, ubuntu-latest, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debug/**/osu...	9m 10s
Build only (Android)	15m 10s
Test results	2s
	2h 4m 23s

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