nvim: after/plugin/which-key: Add triggers blacklist

We have some mappings starting with p and need to blacklist in which key
without which using paste 'p' becomes impossible.

nvim/.config/nvim/after/plugin/which-key.lua

@@ -1 +1,7 @@
-require("which-key").setup {}
+require("which-key").setup {
+  triggers_blacklist = {
+    n = { "p" },
+    i = { "j", "k" },
+    v = { "j", "k" },
+  },
+}