chore: Fix pid (#8192)

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### <samp>🤖 Generated by Copilot at be4eb58</samp>

### Summary
🔄🌾🚀

<!--
1. 🔄 This emoji represents the swapping or changing of the pid from 42
to 41, indicating that the farm id was updated to match the contract
deployment.
2. 🌾 This emoji represents the farm or farming feature, indicating that
the change affects the ETHX-BUSD farm and its rewards.
3. 🚀 This emoji represents the launch or deployment of the new contract
and farms, indicating that the change is part of the V3 release and
upgrade.
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Updated the pid of the ETHX-BUSD farm in `eth.ts` to match the contract
deployment. This is part of a pull request that adds new farms for V3.

> _`pid` of farm changed_
> _Contract deployment updated_
> _V3 launch in spring_

### Walkthrough
* Change the pid of the ETHX-BUSD farm to match the contract deployment
([link](https://github.com/pancakeswap/pancake-frontend/pull/8192/files?diff=unified&w=0#diff-1061ed839e27418db7270f395760f2b46f58d641b76b0d42c3c637a01797617bL52-R52))

packages/farms/constants/eth.ts

@@ -49,7 +49,7 @@ export const farmsV3 = defineFarmV3Configs([
   },
   // Keep those farms on top
   {
-    pid: 42,
+    pid: 41,
     lpAddress: '0x4D4c8F2f30e0224889ab578283A844e10B57e0F8',
     token0: ethereumTokens.ethx,
     token1: ethereumTokens.weth,