Update Safari data for Alt-Svc HTTP header

This PR updates and corrects version values for Safari (Desktop and iOS/iPadOS) for the `Alt-Svc` HTTP header. The data comes from a commit in the browser's source code, mapped to a version number using available tooling or via the commit timestamp.

Commit: WebKit/WebKit@2162ae8

Additional Notes: Fixes mdn#21845.

http/headers/Alt-Svc.json

@@ -32,7 +32,8 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": "preview"
+              "version_added": "17",
+              "impl_url": "https://webkit.org/b/255017"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",