feat: add dune icon (#621)

* feat: adding dune (ocaml build system) icon

* fix: changing dune build icon to ocaml

Author: ashton

lua/nvim-web-devicons/default/icons_by_filename.lua

@@ -96,6 +96,7 @@ return {
   ["docker-compose.yaml"]        = { icon = "󰡨", color = "#458EE6", cterm_color = "68",  name = "Dockerfile"              },
   ["docker-compose.yml"]         = { icon = "󰡨", color = "#458EE6", cterm_color = "68",  name = "Dockerfile"              },
   ["dockerfile"]                 = { icon = "󰡨", color = "#458EE6", cterm_color = "68",  name = "Dockerfile"              },
+  ["dune"]                       = { icon = "", color = "#8a421e", cterm_color = "124", name = "Dunefile"                },
   ["eslint.config.cjs"]          = { icon = "", color = "#4B32C3", cterm_color = "56",  name = "Eslintrc"                },
   ["eslint.config.js"]           = { icon = "", color = "#4B32C3", cterm_color = "56",  name = "Eslintrc"                },
   ["eslint.config.mjs"]          = { icon = "", color = "#4B32C3", cterm_color = "56",  name = "Eslintrc"                },

lua/nvim-web-devicons/filetypes.lua

@@ -48,6 +48,7 @@ return {
   ["drools"] = "drl",
   ["dropbox"] = "dropbox",
   ["dump"] = "dump",
+  ["dune"] = "dune",
   ["editorconfig"] = ".editorconfig",
   ["eex"] = "eex",
   ["ejs"] = "ejs",