Clean up whitespace (#10755)

I saved the `file_types.json` file and got a diff because it had some
trailing whitespace. I ran
[`lineman`](https://github.com/JosephTLyons/lineman) on the codebase.
I've done this before, but this time, I've added in the following
settings to our `.zed` local settings, to make sure every future save
respects our desire to have consistent whitespace formatting.

```json
"remove_trailing_whitespace_on_save": true,
"ensure_final_newline_on_save": true
```

Release Notes:

- N/A

crates/languages/src/json/highlights.scm

@@ -18,4 +18,4 @@
   "}"
   "["
   "]"
-] @punctuation.bracket
+] @punctuation.bracket

crates/languages/src/json/overrides.scm

@@ -1 +1 @@
-(string) @string
+(string) @string

crates/languages/src/json/redactions.scm

@@ -1,4 +1,4 @@
 (pair value: (number) @redact)
 (pair value: (string) @redact)
 (array (number) @redact)
-(array (string) @redact)
+(array (string) @redact)