Change test class name to match syntax type

Author: kimdv

…ntaxBuilderTest/StringLiteralTests.swift …rTest/StringLiteralExprSyntaxTests.swiftTests/SwiftSyntaxBuilderTest/StringLiteralTests.swift renamed to Tests/SwiftSyntaxBuilderTest/StringLiteralExprSyntaxTests.swift Tests/SwiftSyntaxBuilderTest/StringLiteralTests.swift renamed to Tests/SwiftSyntaxBuilderTest/StringLiteralExprSyntaxTests.swift

@@ -14,7 +14,7 @@ import XCTest
 import SwiftSyntax
 import SwiftSyntaxBuilder
 
-final class StringLiteralTests: XCTestCase {
+final class StringLiteralExprSyntaxTests: XCTestCase {
   func testStringLiteral() {
     let leadingTrivia = Trivia.unexpectedText("␣")
     let testCases: [UInt: (String, String)] = [