Fix query in "deployGrant"

[joeymeere]

In @lib/deployGrant.ts, the values for "pool" and "tag" are hard-coded for now.

Expected behavior:

• Run firebase query for documents in the "pools" collection based on the pool name entered in /create
• Select the first object in the returned snapshot
• Extract id and data
• Add poolId and name to grant with the "addDoc" method, along with other passed in data

Current Behavior:

• Firebase query is seemingly successful
• Returns undefined when attempting to iterate through it
• addDoc fails

This results in the values being hard-coded as a patch solution, as we will be testing with a single grant round. However, this will need to be fixed in the future when we implement the ability for anyone to create a round.