feat: change fallback login url

Signed-off-by: windstone <notwindstone@gmail.com>

CMakeLists.txt

@@ -176,7 +176,7 @@ endif()
 set(Launcher_NEWS_RSS_URL "https://prismlauncher.org/feed/feed.xml" CACHE STRING "URL to fetch Prism Launcher's news RSS feed from.")
 set(Launcher_NEWS_OPEN_URL "https://prismlauncher.org/news" CACHE STRING "URL that gets opened when the user clicks 'More News'")
 set(Launcher_HELP_URL "https://prismlauncher.org/wiki/help-pages/%1" CACHE STRING "URL (with arg %1 to be substituted with page-id) that gets opened when the user requests help")
-set(Launcher_LOGIN_CALLBACK_URL "https://prismlauncher.org/successful-login" CACHE STRING "URL that gets opened when the user successfully logins.")
+set(Launcher_LOGIN_CALLBACK_URL "https://freesmlauncher.windstone.space/successful-login" CACHE STRING "URL that gets opened when the user successfully logins.")
 set(Launcher_FMLLIBS_BASE_URL "https://files.prismlauncher.org/fmllibs/" CACHE STRING "URL for FML Libraries.")
 
 ######## Set version numbers ########