[Style guide] Updated keyboard shortcut style

src/content/docs/style-guide/formatting/keyboard-keys.mdx

@@ -4,4 +4,24 @@ title: Keyboard keys
 
 ---
 
-Use *select* instead of *click* when directing users to choose or select objects, commands, or options. Use *press* only when referring to pressing keys on a keyboard.
+## Wording
+
+- Use **select** instead of **click** when directing users to choose or select objects, commands, or options.
+- Use **press** only when referring to pressing keys on a keyboard.
+
+## Formatting keyboard shortcuts
+
+When telling readers what keyboard shortcuts to use to achieve a result:
+- Place the keyboard shortcut in between backticks (monospace formatting)
+- Use uppercase letters with the abbreviated version of the key (`CTRL` instead of `CONTROL`, `CMD` instead of `COMMAND`for example)
+- Wrap the complete keyboard shortcut in between backticks, including the plus sign:
+	- **Do**:
+	```mdx
+	`CTRL + C`
+	```
+
+	- **Don't**:
+	```mdx
+	`CTRL` + `C`
+	```
+- Do not use the old `<kbd></kbd>` component