chore: update pkgver to 1.8.3 in PKGBUILD #1313

Job	Run time
test (ubuntu-latest)	14m 35s
test (macos-latest)	21m 14s
test (windows-latest)	15m 22s
build-windows-installer	4m 44s
build-binaries (macos-latest, darwin, arm64, goanime-darwin-arm64, goanime-darwin-arm64)	2m 41s
build-binaries (ubuntu-latest, linux, amd64, goanime-linux, goanime-linux-amd64)	3m 2s
build-binaries (macos-latest, darwin, amd64, goanime-darwin-amd64, goanime-darwin-amd64)	2m 55s
build-binaries (windows-latest, windows, amd64, goanime.exe, goanime-windows-amd64)	4m 25s
	1h 8m 58s

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