add docs about multiple providers

Author: RoiGlinik

docs/configuration/holmesgpt/index.rst

@@ -223,6 +223,44 @@ Choose an AI provider below and follow the instructions:
 
         Run a :ref:`Helm Upgrade <Simple Upgrade>` to apply the configuration.
 
+    .. tab-item:: Multiple providers
+        :name: multiple-providers
+
+        Starting from version *0.22.1*, Robusta supports an alternative way to configure AI models: using a YAML dictionary in your Helm values file.
+
+        This method allows you to configure multiple models at once, each with its own credentials.
+
+        Update your Helm values (``generated_values.yaml`` file) with the following configuration.
+
+        When multiple models are defined, the Robusta UI will allow users to choose a specific model when initiating an AI-based investigation.
+
+        .. admonition:: Model info
+            :class: warning
+
+            When using multiple providers, the keys differ slightly from the single-provider case.
+
+        .. code-block:: yaml
+
+          enableHolmesGPT: true
+
+          holmes:
+            modelCredentials: # sample configuration.
+              openai:
+                model: openai/gpt-4o
+                api_key: <your-api-key>
+              azure-low-budget: 
+                model : azure/team-low-budget
+                api_base : <your-api-base> # fill in the base endpoint url of your azure deployment - e.g. https://my-org.openai.azure.com/
+                api_version : "2024-06-01"
+                api_key : "{{ env.AZURE_API_KEY }}" # you can load the values from an environment variable as well.
+              bedrock-devops: 
+                model: bedrock/anthropic.claude-3-5-sonnet-20240620-v1:0 # your bedrock model.
+                aws_region_name: us-east-1
+                aws_access_key_id: <your-aws-access-key-id>
+                aws_secret_access_key: <your-aws-secret-access-key>
+
+        Run a :ref:`Helm Upgrade <Simple Upgrade>` to apply the configuration.
+
 Configuring HolmesGPT Access to SaaS Data
 ----------------------------------------------------