Update project.pbxproj

Nextcloud.xcodeproj/project.pbxproj

@@ -5092,8 +5092,8 @@
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/nextcloud/NextcloudKit";
 			requirement = {
-				branch = develop;
-				kind = branch;
+				kind = exactVersion;
+				version = 2.9.0;
 			};
 		};
 		F788ECC5263AAAF900ADC67F /* XCRemoteSwiftPackageReference "MarkdownKit" */ = {