fix: prevent .jar.* files from being detected as plugins

MC Plugins Manager v1.2.0 is here!

With major improvements, bug fixes, and more!!!

• Added the ability to enable or disable installed Minecraft plugins.
• Added the ability to switch the version of an installed Minecraft plugin.
• Added a badge to show the detected Plugin Loader and Minecraft version.
• Added an alert if the Plugin Loader or Minecraft version cannot be detected.
• Added pagination and search filters to the Versions tab on the Plugin Details page.
• Redesigned the user interface for the Browse and Manage Plugins pages.
• Redesigned the Versions tab on the Plugin Details page to display versions in a table.
• Improved the Install Plugin modal UI to allow loader and version selection, which automatically defaults to the detected Plugin Loader and Minecraft version.
• Fixed an issue where updates for Velocity plugins would not load.
• Added Spanish translations.

• Update to Calagopus 1.1.0
• Fixed some minor bugs