docs: correct typos, capitalization, and update link in documentation

[savvar9991]

1. Fixed Typo: "DATABSE_URL" → "DATABASE_URL"

• The term "DATABSE_URL" was misspelled and has been corrected to "DATABASE_URL."

2. Fixed Typo: "volumens" → "volumes"

• The word "volumens" was incorrect and has been updated to "volumes."

3. Updated "l1 erc20" → "L1 ERC20"

• Corrected the capitalization of "l1 erc20" to "L1 ERC20" to follow proper naming conventions.

4. Removed Redundant Phrase: "the the" → "the"

• The duplicate "the the" was removed and replaced with a single "the."

5. Updated Link

• Updated the link to the correct version, as shown in the "before" and "after" images.
  before:
  
  after: