Add polygon to list of tokens.erc20 blockchains

[hildobby]

Brief comments on the purpose of your changes:

For Dune Engine V2

I've checked that:

General checks:

• I tested the query on dune.com after compiling the model with dbt compile (compiled queries are written to the target directory)
• I used "refs" to reference other models in this repo and "sources" to reference raw or decoded tables
• if adding a new model, I added a test
• the filename is unique and ends with .sql
• each sql file is a select statement and has only one view, table or function defined
• column names are lowercase_snake_cased
• if adding a new model, I edited the dbt project YAML file with new directory path for both models and seeds (if applicable)
• if wanting to expose a model in the UI (Dune data explorer), I added a post-hook in the JINJA config to add metadata (blockchains, sector/project, name and contributor Dune usernames)

Pricing checks:

• coin_id represents the ID of the coin on coinpaprika.com
• all the coins are active on coinpaprika.com (please remove inactive ones)

Join logic:

• if joining to base table (i.e. ethereum transactions or traces), I looked to make it an inner join if possible

Incremental logic:

• I used is_incremental & not is_incremental jinja block filters on both base tables and decoded tables
  • where block_time >= date_trunc("day", now() - interval '1 week')
• if joining to base table (i.e. ethereum transactions or traces), I applied join condition where block_time >= date_trunc("day", now() - interval '1 week')
• if joining to prices view, I applied join condition where minute >= date_trunc("day", now() - interval '1 week')