Hotfix: Add mapping for NDX token price on Arbitrum

[rabmarut]

Description

Add ChainMap entry for the Indexed Finance NDX token, mapping its Arbitrum address to its Ethereum address:
0xB965029343D55189c25a7f3e0c9394DC0F5D41b1 -> 0x86772b1409b61c639EaAc9Ba0AcfBb6E238e5F83

The address pairing used above can be found in Arbitrum's official token list: https://bridge.arbitrum.io/token-list-42161.json

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

How should this be tested?

• Verify that the dedicated page for this pool ID (on Arbitrum!) displays a dollar value for the NDX token: 0x5ced962afbfb7e13fb215defc2b027678237aa3a000200000000000000000011
• Verify that this warning is not shown for the same pool: "Price information is missing for this pool, since it contains a token not found by our price provider."

Checklist:

• I have performed a self-review of my own code
• I have commented my code where relevant, particularly in hard-to-understand areas
• My changes generate no new console warnings
• The base of this PR is master if hotfix, develop if not

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployments, click below or on the icon next to each commit.

kovan-app – ./

🔍 Inspect: https://vercel.com/balancer/kovan-app/8aBtGzSh1BpH7WHu2Xyu4cow7hL1
✅ Preview: Canceled

[Deployment for c563ccd canceled]

app – ./

🔍 Inspect: https://vercel.com/balancer/app/HfCTo89b2DMLmzzFvZHgdML59CRd
✅ Preview: Canceled

[Deployment for c563ccd canceled]

staging-app – ./

🔍 Inspect: https://vercel.com/balancer/staging-app/HvJDvqT3cbqufbQx4dPq8JBkeN2Y
✅ Preview: https://staging-app-git-arbitrum-ndx-price-balancer.vercel.app

staging-kovan-app – ./

🔍 Inspect: https://vercel.com/balancer/staging-kovan-app/FL2joNd5H9FHpEiHaeQU1nN1wE3X
✅ Preview: https://staging-kovan-app-git-arbitrum-ndx-price-balancer.vercel.app

gnosis – ./

🔍 Inspect: https://vercel.com/balancer/gnosis/9J5z2bKaEcGA7fdzkyzKyA5oTmrd
✅ Preview: https://gnosis-git-arbitrum-ndx-price-balancer.vercel.app

polygon – ./

🔍 Inspect: https://vercel.com/balancer/polygon/6E4y8MDk6ML84jpbEmrM5dTQZvb2
✅ Preview: Canceled

[Deployment for c563ccd canceled]

beta-polygon – ./

🔍 Inspect: https://vercel.com/balancer/beta-polygon/Cuo31bBNCNqmge3jsCMtbHCyDp8y
✅ Preview: https://beta-polygon-git-arbitrum-ndx-price-balancer.vercel.app

beta-arbitrum – ./

🔍 Inspect: https://vercel.com/balancer/beta-arbitrum/AguaVb8Lt1AiGtRXFrzNTzA9FVPD
✅ Preview: https://beta-arbitrum-git-arbitrum-ndx-price-balancer.vercel.app

arbitrum – ./

🔍 Inspect: https://vercel.com/balancer/arbitrum/AHeypG8sQsARU2XmX2Yojsa5SraK
✅ Preview: Canceled

[Deployment for c563ccd canceled]