Adding format_d3_locale example

docs/docs/reference/project-files/metrics-view.md

@@ -53,7 +53,10 @@ In your Rill project directory, create a metrics view, `<metrics_view>.yaml`, fi
   - **`format_d3_locale`** — locale configuration passed through to D3, enabling changing the currency symbol among other things. For details, see the docs for D3's [`formatLocale`](https://d3js.org/d3-format#formatLocale). _(optional)_
 
 ```yaml
-
+  format_d3: "$,"
+  format_d3_locale: 
+    grouping: [3, 2]
+    currency: ["₹", ""]
 ```
   - **`format_preset`** — controls the formatting of this measure according to option specified below. Measures <u>cannot</u> have both `format_preset` and `format_d3` entries. _(optional; if neither `format_preset` nor `format_d3` is supplied, measures will be formatted with the `humanize` preset)_
     - `humanize` — round off numbers in an opinionated way to thousands (K), millions (M), billions (B), etc.