fix: remove extra 0x in outputted text when pop up

[AlexD10S]

Closes #293

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.23%. Comparing base (e829471) to head (10f2d09).
Report is 2 commits behind head on main.

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
- Coverage   70.28%   70.23%   -0.06%     
==========================================
  Files          52       53       +1     
  Lines        8657     9086     +429     
  Branches     8657     9086     +429     
==========================================
+ Hits         6085     6382     +297     
- Misses       1636     1720      +84     
- Partials      936      984      +48     

Files with missing lines	Coverage Δ
crates/pop-contracts/src/up.rs	77.40% <100.00%> (+0.16%)	⬆️

... and 10 files with indirect coverage changes