Merge #8482

8482:  Mention how to customize unsafe operation styles r=matklad a=danielzfranklin

I was confused about how to do this, so I filed #8474. I apologize for initially filing this incorrectly and spamming people.

Co-authored-by: Daniel Franklin <daniel@danielzfranklin.org>

Author: bors[bot]

docs/user/manual.adoc

@@ -611,6 +611,41 @@ For example, mutable bindings are underlined by default and you can override thi
 }
 ----
 
+Most themes doesn't support styling unsafe operations differently yet. You can fix this by adding overrides for the rules `operator.unsafe`, `function.unsafe`, and `method.unsafe`:
+
+[source,jsonc]
+----
+{
+   "editor.semanticTokenColorCustomizations": {
+         "rules": {
+             "operator.unsafe": "#ff6600",
+             "function.unsafe": "#ff6600"
+             "method.unsafe": "#ff6600"
+         }
+    },
+}
+----
+
+In addition to the top-level rules you can specify overrides for specific themes. For example, if you wanted to use a darker text color on a specific light theme, you might write:
+
+[source,jsonc]
+----
+{
+   "editor.semanticTokenColorCustomizations": {
+         "rules": {
+             "operator.unsafe": "#ff6600"
+         },
+         "[Ayu Light]": {
+            "rules": {
+               "operator.unsafe": "#572300"
+            }
+         }
+    },
+}
+----
+
+Make sure you include the brackets around the theme name. For example, use `"[Ayu Light]"` to customize the theme Ayu Light.
+
 ==== Special `when` clause context for keybindings.
 You may use `inRustProject` context to configure keybindings for rust projects only.
 For example: