try to fix table

docs/sources/guides/whats-new-in-v5-1.md

@@ -100,7 +100,7 @@ In the table below you can see some examples and you can find all different opti
 Filter Option | Example | Raw | Interpolated | Description
 ------------ | ------------- | ------------- | -------------  | -------------
 `glob` | ${servers:glob} |  `'test1', 'test2'` | `{test1,test2}` | Formats multi-value variable into a glob
-`regex` | ${servers:regex} | `'test.', 'test2'` |  `(test\\.|test2)` | Formats multi-value variable into a regex string
+`regex` | ${servers:regex} | `'test.', 'test2'` |  ```(test\\.|test2)``` | Formats multi-value variable into a regex string
 `pipe` | ${servers:pipe} | `'test.', 'test2'` |  `test.|test2` | Formats multi-value variable into a pipe-separated string
 `csv`| ${servers:csv} |  `'test1', 'test2'` | `test1,test2` | Formats multi-value variable as a comma-separated string
 
@@ -122,4 +122,4 @@ More information in the [Provisioning documentation](/features/datasources/prome
 ## Changelog
 
 Checkout the [CHANGELOG.md](https://github.com/grafana/grafana/blob/master/CHANGELOG.md) file for a complete list
-of new features, changes, and bug fixes.
\ No newline at end of file
+of new features, changes, and bug fixes.