fix: checkhealth reported nvim version (nvim-lua#685)

Author: dam9000

lua/kickstart/health.lua

@@ -6,15 +6,16 @@
 --]]
 
 local check_version = function()
+  local verstr = string.format('%s.%s.%s', vim.version().major, vim.version().minor, vim.version().patch)
   if not vim.version.cmp then
-    vim.health.error(string.format("Neovim out of date: '%s'. Upgrade to latest stable or nightly", tostring(vim.version())))
+    vim.health.error(string.format("Neovim out of date: '%s'. Upgrade to latest stable or nightly", verstr))
     return
   end
 
   if vim.version.cmp(vim.version(), { 0, 9, 4 }) >= 0 then
-    vim.health.ok(string.format("Neovim version is: '%s'", tostring(vim.version())))
+    vim.health.ok(string.format("Neovim version is: '%s'", verstr))
   else
-    vim.health.error(string.format("Neovim out of date: '%s'. Upgrade to latest stable or nightly", tostring(vim.version())))
+    vim.health.error(string.format("Neovim out of date: '%s'. Upgrade to latest stable or nightly", verstr))
   end
 end