[NFC] use characters that are more suitable for Version.init(extendedGraphemeClusterLiteral:) and Version.init(unicodeScalarLiteral:) in teseting

Author: WowbaggersLiquidLunch

Tests/PackageDescriptionTests/VersionTests.swift

@@ -525,11 +525,11 @@ class VersionTests: XCTestCase {
     // A semantic version string is always longer than 1 character, so the only way to test these 2 initialisers is by calling them directly.
 
     func testExpressingVersionByExtendedGraphemeClusterLiteral() {
-        XCTAssertEqual(Version(extendedGraphemeClusterLiteral: "版"), Version(0, 0, 0))
+        XCTAssertEqual(Version(extendedGraphemeClusterLiteral: "版⃣"), Version(0, 0, 0))
     }
 
     func testExpressingVersionByUnicodeScalarLiteral() {
-        XCTAssertEqual(Version(unicodeScalarLiteral: "é"), Version(0, 0, 0))
+        XCTAssertEqual(Version(unicodeScalarLiteral: "a"), Version(0, 0, 0))
     }
 
     func testInitializingVersionFromVersion() {