docs: Update invalid property in a configuration example (#38466)

Just install Zed for the first time and got a warning from the first
config example i copied from docs.
Great design btw, immediately able to see that this is a well thought
out app. seems like i'll stick with zed and make it my new dev
'sanctuary'.

Release Notes:

- N/A

docs/src/visual-customization.md

@@ -227,7 +227,7 @@ TBD: Centered layout related settings
   "git": {
     "inline_blame": {
       "enabled": true,             // Show/hide inline blame
-      "delay": 0,                  // Show after delay (ms)
+      "delay_ms": 0,                  // Show after delay (ms)
       "min_column": 0,             // Minimum column to inline display blame
       "padding": 7,                // Padding between code and inline blame (em)
       "show_commit_summary": false // Show/hide commit summary