Update instruction on running SDK built with master (#49240)

enterprise/frontend/src/embedding-sdk/README.md

@@ -76,24 +76,12 @@ Prerequisites:
 
 Currently, the SDK only works with Metabase version 50.
 
-You have the following options:
-
-### 1. Running on Docker
+### Running on Docker
 
 Start the Metabase container:
 
 ```bash
-docker run -d -p 3000:3000 --name metabase metabase/metabase-enterprise:v1.50.24
-```
-
-### 2. Running the Jar file
-
-1. Download the Jar file from https://downloads.metabase.com/enterprise/v1.50.24/metabase.jar
-2. Create a new directory and move the Metabase JAR into it.
-3. Change into your new Metabase directory and run the JAR.
-
-```bash
-java -jar metabase.jar
+docker run -d -p 3000:3000 --name metabase metabase/metabase-enterprise-head:latest
 ```
 
 ## Configuring Metabase