docs: fix typo (#427)

README.md

@@ -126,7 +126,7 @@ cmp.event:on(
           ---@param rules table
           ---@param commit_character table<string>
           handler = function(char, item, bufnr, rules, commit_character)
-            -- Your handler function. Inpect with print(vim.inspect{char, item, bufnr, rules, commit_character})
+            -- Your handler function. Inspect with print(vim.inspect{char, item, bufnr, rules, commit_character})
           end
         }
       },