docs: flatten proxy config — single block covering runner + holmes

Combine the separate "Configuring Proxy Settings for Robusta" and
"... for HolmesGPT" sections into one. Show a single Helm-values
example that sets HTTP_PROXY/HTTPS_PROXY on both deployments at once,
and keep the env_froms note as a brief follow-up for many-at-once
overrides.

https://claude.ai/code/session_019GQrc8wVq14if8f7F3pp4f

Author: claude

docs/setup-robusta/proxies.rst

@@ -3,24 +3,28 @@ Deploying Behind Proxies
 
 If your Kubernetes cluster is behind an HTTP proxy or firewall, follow the instructions below to ensure Robusta and HolmesGPT has the necessary access.
 
-Configuring Proxy Settings for Robusta
+Configuring Proxy Settings
 ----------------------------------------
 
-Outbound traffic from Robusta is handled by the `robusta-runner` deployment.
+Set the ``HTTP_PROXY`` and ``HTTPS_PROXY`` environment variables in your Helm values:
 
-To configure proxy settings for `robusta-runner`, set the `HTTP_PROXY` and `HTTPS_PROXY` environment variables. You can do so with one of the following Helm values:
+.. code-block:: yaml
 
-* ``runner.additional_env_vars`` - to set one environment variable at a time
-* ``runner.additional_env_froms`` - to set many environment variables at once
+    runner:
+      additional_env_vars:
+        - name: HTTP_PROXY
+          value: "http://your-proxy:port"
+        - name: HTTPS_PROXY
+          value: "http://your-proxy:port"
 
-Configuring Proxy Settings for HolmesGPT
-----------------------------------------
-
-Set the `HTTP_PROXY` and `HTTPS_PROXY` environment variables. You can do so with the following Helm values:
-
-* ``holmes.additionalEnvVars`` - to set one environment variable at a time
+    holmes:
+      additionalEnvVars:
+        - name: HTTP_PROXY
+          value: "http://your-proxy:port"
+        - name: HTTPS_PROXY
+          value: "http://your-proxy:port"
 
-Either Helm value can be used, depending on your preference. See `this GitHub issue for details and an example configuration <https://github.com/robusta-dev/robusta/pull/450>`_.
+To set many variables at once, ``runner.additional_env_froms`` accepts a Kubernetes ``envFrom`` source. See `this GitHub issue <https://github.com/robusta-dev/robusta/pull/450>`_ for details and examples.
 
 Domains Used by Robusta Saas UI
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