Fix exception set comment to match Xcode

[walkingbrad]

When Xcode edits the project file, it reverts this specific (though helpful) comment to PBXFileSystemSynchronizedBuildFileExceptionSet.

So this prevents this line from continuing to get changed/reverted as we edit project files in both Xcode and xcodeproj

[walkingbrad]

This might be a 16.0/1 issue only. Verifying in 16.2...

[sergiocampama]

This fixes CocoaPods/CocoaPods#12697 as this error happens when using the new automatic tracking folder groups in Xcode 16 and above.

[robnadin]

Any movement on this?

[reggian]

It also happens on our project.

Along with the formatting back and forths:
Xcode 16.2 uses condensed format:

/* Begin PBXFileSystemSynchronizedRootGroup section */
		E12863882D59E53C00CA99E1 /* Sources */ = {isa = PBXFileSystemSynchronizedRootGroup; exceptions = (E12864172D59E53D00CA99E1 /* PBXFileSystemSynchronizedBuildFileExceptionSet */, E12864182D59E53D00CA99E1 /* PBXFileSystemSynchronizedBuildFileExceptionSet */, ); explicitFileTypes = {}; explicitFolders = (); path = Sources; sourceTree = "<group>"; };
/* End PBXFileSystemSynchronizedRootGroup section */

Xcodeproj 1.27.0 uses petty printed:

/* Begin PBXFileSystemSynchronizedRootGroup section */
		E12863882D59E53C00CA99E1 /* Sources */ = {
			isa = PBXFileSystemSynchronizedRootGroup;
			exceptions = (
				E12864172D59E53D00CA99E1 /* Exceptions for "Sources" folder in "IntentsExtensionUI" target */,
				E12864182D59E53D00CA99E1 /* Exceptions for "Sources" folder in "WidgetExtension" target */,
			);
			explicitFileTypes = {
			};
			explicitFolders = (
			);
			path = Sources;
			sourceTree = "<group>";
		};
/* End PBXFileSystemSynchronizedRootGroup section */

[robnadin]

It also happens on our project.

Unfortunately this can only be fixed in one of CocoaPods' dependencies.

I've raised a PR to fix it here but it needs the attention of the maintainers.