Fix spelling of directory name

Diffiable > Diffable

Mastodon.xcodeproj/project.pbxproj

@@ -1342,7 +1342,7 @@
 			path = Protocol;
 			sourceTree = "<group>";
 		};
-		2D76319C25C151DE00929FB9 /* Diffiable */ = {
+		2D76319C25C151DE00929FB9 /* Diffable */ = {
 			isa = PBXGroup;
 			children = (
 				DB4F097826A039B400D62E92 /* Onboarding */,
@@ -1357,7 +1357,7 @@
 				DB3E6FE52806A5BA00B035AE /* Discovery */,
 				DB0617FA27855B660030EE79 /* Settings */,
 			);
-			path = Diffiable;
+			path = Diffable;
 			sourceTree = "<group>";
 		};
 		2D7631A425C1532200929FB9 /* Share */ = {
@@ -1762,7 +1762,7 @@
 			children = (
 				DB89BA1025C10FF5008580ED /* Mastodon.entitlements */,
 				DB427DE325BAA00100D1B89D /* Info.plist */,
-				2D76319C25C151DE00929FB9 /* Diffiable */,
+				2D76319C25C151DE00929FB9 /* Diffable */,
 				DB8AF55525C1379F002E6C99 /* Scene */,
 				DB8AF54125C13647002E6C99 /* Coordinator */,
 				DB8AF56225C138BC002E6C99 /* Extension */,