[examples/openspending][lg] - adding drd support

examples/openspending/content/stories/about.mdx

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+---
+title: Sample Data Story
+date: 06/06/2023
+---
+
+This is a sample data story, you can add charts
+
+<LineChart
+  data="https://raw.githubusercontent.com/datasets/oil-prices/main/data/wti-year.csv"
+  title="Oil Price x Year"
+  xAxis="Date"
+  yAxis="Price"
+/>
+
+Or you can add previews
+
+<FlatUiTable url="https://raw.githubusercontent.com/datasets/oil-prices/main/data/wti-year.csv" />
+
+And you can of course add markdown
+
+## Subtitles
+
+- Lists
+- Lists
+
+You can also add mermaid charts
+
+```mermaid
+  graph TD;
+      A-->B;
+      A-->C;
+      B-->D;
+      C-->D;
+```