Bump SkiaSharp from 2.88.0 to 2.88.6 in /Demo-ASP.NET-Core (#19) #51

Job	Run time
Build and run tests (macos-latest, 3.1.x)	1m 6s
Build and run tests (macos-latest, 5.0.x)	46s
Build and run tests (macos-latest, 6.0.x)	52s
Build and run tests (macos-latest, 7.0.x)	1m 3s
Build and run tests (ubuntu-latest, 3.1.x)	2m 23s
Build and run tests (ubuntu-latest, 5.0.x)	48s
Build and run tests (ubuntu-latest, 6.0.x)	50s
Build and run tests (ubuntu-latest, 7.0.x)	39s
Build and run tests (windows-latest, 3.1.x)	3m 51s
Build and run tests (windows-latest, 5.0.x)	3m 29s
Build and run tests (windows-latest, 6.0.x)	3m 38s
Build and run tests (windows-latest, 7.0.x)	2m 53s
	22m 18s

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