fixes chain id extraction for the seed peer metric

[deepthiskumar]

Fixes the error Expecting property name enclosed in double quotes: line 1 column 2 (char 1) seen on mainnet watchdog pod.
The format of the string returned by mina client status --json is not recognized by the python json decoder. Requires keys to be in double quotes instead of single quotes that the command returns-

{'num_accounts': None, 'blockchain_length': None, 'highest_block_length_received': 1, 'highest_unvalidated_block_length_received': 0, 'uptime_secs': 240370, 'ledger_merkle_root': None, 'state_hash': None, 'chain_id': '5f704cc0c82e0ed70e873f0893d7e06f148524e3f0bdae2afb02e7819a0c24d1', ...

Tested by running the watchdog script locally and connecting to mainnet seeds

[es92]

Can you bump the version and do a make release for this too? It should be 0.4.5, there's already a 0.4.4 version update out

[deepthiskumar]

pushed gcr.io/o1labs-192920/watchdog:0.4.5

[bkase]

!approved-for-mainnet