update: make RSSItemCategory equatable #136

Job	Run time
Build on Ubuntu (ubuntu-20.04, 5.7.3)	1m 2s
Build on Ubuntu (ubuntu-20.04, 5.8)	1m 7s
Build on Ubuntu (ubuntu-22.04, 5.7.3)	1m 3s
Build on Ubuntu (ubuntu-22.04, 5.8)	1m 11s
Build on Ubuntu (ubuntu-20.04, 5.5.3)	1m 18s
Build on Ubuntu (ubuntu-20.04, 5.6.3)	54s
Build on macOS (macos-12, /Applications/Xcode_13.3.app, 15.4, 8.5, Apple Watch Series 7 - 41mm, i...	1s
Build on macOS (macos-12, /Applications/Xcode_13.4.1.app, 15.5, 8.5, Apple Watch Series 7 - 41mm,...	20m 44s
Build on macOS (macos-12, /Applications/Xcode_14.0.1.app, 16.0, 9.0, Apple Watch Series 8 (41mm),...	21m 53s
Build on macOS (macos-12, /Applications/Xcode_14.1.app, 16.1, 9.1, Apple Watch Ultra (49mm), iPho...	19m 56s
Build on macOS (macos-12, /Applications/Xcode_14.2.app, 16.2, 9.1, Apple Watch Ultra (49mm), iPho...	6m 39s
Build on macOS (macos-13, /Applications/Xcode_14.3.app, 16.4, 9.4, Apple Watch Ultra (49mm), iPho...	1s
Deploy to Netlify	0s
	1h 15m 49s

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