Correct the serverURL for swift.org and add an integration test to verify it

Author: cmcgee1024

Sources/SwiftlyCore/HTTPClient.swift

@@ -120,7 +120,7 @@ internal class HTTPRequestExecutorImpl: HTTPRequestExecutor {
         let swiftlyUserAgent = SwiftlyUserAgentMiddleware()
 
         let client = Client(
-            serverURL: URL(string: "https://swift.org/api")!,
+            serverURL: try Servers.Server1.url(),
             transport: AsyncHTTPClientTransport(configuration: config),
             middlewares: [swiftlyUserAgent]
         )

Tests/SwiftlyTests/HTTPClientTests.swift

@@ -45,7 +45,12 @@ final class HTTPClientTests: SwiftlyTests {
         XCTAssertTrue(exceptionThrown)
     }
 
-    func testGetMetdataFromSwiftOrg() async throws {
+    func testGetSwiftlyReleaseMetadataFromSwiftOrg() async throws {
+        let currentRelease = try await SwiftlyCore.httpClient.getCurrentSwiftlyRelease()
+        XCTAssertNoThrow(try currentRelease.swiftlyVersion)
+    }
+
+    func testGetToolchainMetdataFromSwiftOrg() async throws {
         let supportedPlatforms = [
             PlatformDefinition.macOS,
             PlatformDefinition.ubuntu2404,