Add a new GitHub workflow to update Cargo.lock

[dc2917]

Description

This PR adds a GitHub workflow to update the cargo lockfile. Update is performed each Monday to be in sync with dependabot.

Fixes #1343

Type of change

• Bug fix (non-breaking change to fix an issue)
• New feature (non-breaking change to add functionality)
• Refactoring (non-breaking, non-functional change to improve maintainability)
• Optimization (non-breaking change to speed up the code)
• Breaking change (whatever its nature)
• Documentation (improve or add documentation)

Key checklist

• All tests pass: $ cargo test
• The documentation builds and looks OK: $ cargo doc
• Update release notes for the latest release if this PR adds a new feature or fixes a bug
  present in the previous release

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.68%. Comparing base (88ea927) to head (029713d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1375   +/-   ##
=======================================
  Coverage   89.68%   89.68%           
=======================================
  Files          58       58           
  Lines        8406     8406           
  Branches     8406     8406           
=======================================
  Hits         7539     7539           
  Misses        550      550           
  Partials      317      317           

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