readme.md fix formatting,2

Signed-off-by: Artem Navoiev <[email protected]>

README.md

@@ -241,7 +241,7 @@ This example uses init container to download and install plugin.
 
 1. To download plugin build and move contents into Grafana plugins directory:
 
-   ```bash
+   ```sh
    ver=$(curl -s https://api.github.com/repos/VictoriaMetrics/victoriametrics-datasource/releases/latest | grep -oE 'v[0-9]+\.[0-9]+\.[0-9]+' | head -1)
    curl -L https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/download/$ver/victoriametrics-datasource-$ver.tar.gz -o /var/lib/grafana/plugins/vm-plugin.tar.gz
    tar -xf /var/lib/grafana/plugins/vm-plugin.tar.gz -C /var/lib/grafana/plugins/