Update Sources/XCTest/Public/XCTestMain.swift

Co-authored-by: Brian Croom <[email protected]>

Author: Sean Olszewski

Sources/XCTest/Public/XCTestMain.swift

@@ -58,7 +58,7 @@
 ///     ./FooTests FooTestCase          # Run all the tests in FooTestCase
 ///
 /// - Parameter testCases: An array of test cases run, each produced by a call to the `testCase` function
-/// - seealso: `testCase
+/// - seealso: `testCase`
 
 @available(*, deprecated, message: "Use XCTMain(_ testCaseClassEntries:) instead.")
 public func XCTMain(_ testCases: [XCTestCaseEntry]) -> Never {