Update plugin index

Author: github-actions[bot]

plugins/index.json

@@ -159,6 +159,11 @@
     "desc": "Rust plugin https://releases.rs/docs/",
     "homepage": "https://github.com/XZzYassin/vfox-rust"
   },
+  {
+    "name": "scala",
+    "desc": "Scala plugin, https://www.scala-lang.org/",
+    "homepage": "https://github.com/version-fox/vfox-scala"
+  },
   {
     "name": "terraform",
     "desc": "Terraform plugin, https://www.terraform.io/",