chore(mcp): prettier-format README env-var tables

The Build MCP / client-prettier / mcp-build CI jobs (and the on-demand
deploy) all fail on 'yarn prettier' over this package because the
operator-knob tables added in the elicitation work were hand-aligned.
Formatting-only; the husky pre-commit hook lints only ts/js, so the
markdown drift never surfaced locally.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N19EppQVZ55hwByVy4HEX8

Author: salevine

app/client/packages/mcp/README.md

@@ -152,11 +152,11 @@ unaffected — the parameter is optional and ignored.
 
   **Operator knobs.**
 
-  | Env var                              | Default | Effect                                                                       |
-  | ------------------------------------ | ------- | ---------------------------------------------------------------------------- |
-  | `APPSMITH_MCP_DISABLE_ELICITATION`   | off     | Forces the relay posture for every session; no elicitation prompts are sent. |
-  | `APPSMITH_MCP_STRICT_ELICITATION`    | off     | Requires in-band prompts: non-elicitation clients are refused (`elicitation_required`) and a `client_error` never degrades to the relay posture. Wins over the disable knob. |
-  | `APPSMITH_MCP_ELICITATION_TIMEOUT_MS`| 120000  | How long a confirm waits for the human's answer before a `timeout` outcome (clamped at 10 minutes). |
+  | Env var                               | Default | Effect                                                                                                                                                                       |
+  | ------------------------------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+  | `APPSMITH_MCP_DISABLE_ELICITATION`    | off     | Forces the relay posture for every session; no elicitation prompts are sent.                                                                                                 |
+  | `APPSMITH_MCP_STRICT_ELICITATION`     | off     | Requires in-band prompts: non-elicitation clients are refused (`elicitation_required`) and a `client_error` never degrades to the relay posture. Wins over the disable knob. |
+  | `APPSMITH_MCP_ELICITATION_TIMEOUT_MS` | 120000  | How long a confirm waits for the human's answer before a `timeout` outcome (clamped at 10 minutes).                                                                          |
 
   Clients that do not reset their tool-call timeout on MCP progress notifications may abort the confirm call
   before the default 120s elicitation wait ends (the server sends keep-alive progress pings only when the caller