nixpkgs/neovim: add vim-rsi

.config/nixpkgs/neovim/plugins/sources.json

@@ -75,5 +75,9 @@
   "aaronik/treewalker.nvim": {
     "rev": "ae229700e1cce34198280f588568dc49c52d9eb1",
     "sha256": "011r3xvc6207jrzd049nfwfdiz20d7syy0l5dzqmr5f8m7kjf6dh"
+  },
+  "tpope/vim-rsi": {
+    "rev": "45540637ead22f011e8215f1c90142e49d946a54",
+    "sha256": "0vr5mlna5f60dmhk4ims7g0ikqw15h21hr619xii1069ggddqr9v"
   }
 }