docs(readme): update backage url

[ReenigneArcher]

Description

Update per: ipitio/backage#14 (comment)

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.62%. Comparing base (ddd67ce) to head (46a48dd).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3091      +/-   ##
=========================================
+ Coverage    9.44%   9.62%   +0.18%     
=========================================
  Files          77     101      +24     
  Lines       14009   17919    +3910     
  Branches     6429    8374    +1945     
=========================================
+ Hits         1323    1725     +402     
- Misses      10072   13320    +3248     
- Partials     2614    2874     +260     

Flag	Coverage Δ
Linux	7.17% <ø> (?)
Windows	4.97% <ø> (ø)
macOS-12	10.41% <ø> (+0.01%)	⬆️
macOS-13	10.33% <ø> (+0.02%)	⬆️
macOS-14	10.60% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 55 files with indirect coverage changes