[xml] Update Bulgarian localization #64

Job	Run time
build_windows_cmake (Release, x64, amd64)	4m 22s
build_windows_msys2 (Release, x86_64)	5m 31s
build_windows (Release, x64)	3m 36s
build_windows_msys2 (Release, i686)	5m 29s
build_windows (Release, Win32)	3m 40s
build_windows_msys2 (Debug, x86_64)	5m 51s
build_windows (Release, ARM64)	4m 6s
build_windows_msys2 (Debug, i686)	4m 48s
build_windows (Debug, x64)	6m 21s
build_windows (Debug, Win32)	3m 59s
build_windows (Debug, ARM64)	3m 2s
	50m 45s

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