Some improvements for VERA page

[ulyanas]

1. Title: Verify and publish contracts to supported networks

2. Text: Verifying source code enhances transparency for users interacting with smart contracts. By submitting the source code, Blockscout ensures that the compiled code matches what is deployed on the blockchain, and then automatically verifies the contract across multiple chains. Learn more

3. Add a footer

   1. Made with Blockscout + copyright

   2. Add links to:

      1. Blockscout https://blockscout.com/
      2. Verifier Alliance https://verifieralliance.org/
      3. Documentation https://docs.blockscout.com/about/partners-and-integrations/vera-verifier-alliance
      4. FAQ https://ethereum.org/en/developers/docs/smart-contracts/verifying/