fix: stop supporting appimage

src-tauri/Cargo.toml

···
 description = "One-click bluesky backups"
 authors = ["Turtlepaw"]
 edition = "2021"
+license = "Apache-2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

src-tauri/tauri.conf.json

···
   },
   "bundle": {
     "active": true,
-    "targets": "all",
+    "targets": [
+      "deb",
+      "rpm",
+      "msi",
+      "dmg"
+    ],
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",