Stats Update

[tom2drum]

Description and Related Issue(s)

Resolves #1400

Proposed Changes

• Rename the variable NEXT_PUBLIC_NETWORK_GOVERNANCE_TOKEN_SYMBOL to NEXT_PUBLIC_NETWORK_SECONDARY_COIN_SYMBOL.
• Add new value secondary_coin_price to NEXT_PUBLIC_HOMEPAGE_CHARTS variable

Checklist for PR author

• I have tested these changes locally.
• I added tests to cover any new functionality, following this guide
• Whenever I fix a bug, I include a regression test to ensure that the bug does not reappear silently.
• If I have added, changed, renamed, or removed an environment variable, I have updated the list of environment variables in the documentation and made the necessary changes to the validator script according to the guide