fix string formatting warning

[reubenmiller]

Signed-off-by: Reuben Miller reuben.miller@softwareag.com

Proposed changes

Fix the following compiler warning about a format string used in an error for tedge_agent:

    Compiling tedge_agent v0.8.1 (/workspaces/fork/crates/core/tedge_agent)
warning: named argument `timestamp` is not used by name
  --> crates/core/tedge_agent/src/error.rs:50:13
   |
50 |     #[error("Could not convert {timestamp:?} to unix timestamp. Error message: {}")]
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^--^
   |             |                                                                  |
   |             |                                                                  this formatting argument uses named argument `timestamp` by position

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[didier-wenzek]

Thanks! Approved