fix: forc-deploy block url

[sdankel]

Description

It looks like there was a change in how fuel core client returns the block height. It used to be a hex number and we had to convert it to decimal, but now it’s returning the number as a decimal so we don't need to convert it.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[alfiedotwtf]

The old code didn't prepend block_url if it was already decimal? That looks like a bug that's now been fixed in your PR. Two birds :)