Use branch name to set up `renpool-contracts` dependency

[acuarica]

When specifying the Git URL in package.json

renpool-app/package.json

Line 18 in 7b20791

"renpool-contracts": "https://github.com/renpool/renpool-contracts",

We can use the branch name[1]

 "renpool-contracts": "https://github.com/renpool/renpool-contracts#ref/update-claim-rewards-interface", 

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[1] https://docs.npmjs.com/cli/v8/configuring-npm/package-json#urls-as-dependencies