meson: bump min libplacebo version to v7.360.1

This version contains critical fixes to swapchain selection, correct
mapping of sRGB TRC as well as fix for gpu hangs on anv. Bump the
minimum version because the mpv experience with previous version
shouldn't be endorsed or be considered acceptable by upstream.

meson.build

@@ -26,7 +26,7 @@ libavutil = dependency('libavutil', version: '>= 58.29.100')
 libswresample = dependency('libswresample', version: '>= 4.12.100')
 libswscale = dependency('libswscale', version: '>= 7.5.100')
 
-libplacebo = dependency('libplacebo', version: '>=6.338.2',
+libplacebo = dependency('libplacebo', version: '>=7.360.1',
                 default_options: ['default_library=static', 'demos=false'])
 
 libass = dependency('libass', version: '>= 0.12.2')