chore(deps): update dependency pydantic to v2.7.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pydantic (changelog)	==2.7.2 -> ==2.7.3

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Release Notes

pydantic/pydantic (pydantic)

### [`v2.7.3`](https://togithub.com/pydantic/pydantic/blob/HEAD/HISTORY.md#v273-2024-06-03) [Compare Source](https://togithub.com/pydantic/pydantic/compare/v2.7.2...v2.7.3) [GitHub release](https://togithub.com/pydantic/pydantic/releases/tag/v2.7.3) ##### What's Changed ##### Packaging - Bump `pydantic-core` to `v2.18.4` by [@​sydney-runkle](https://togithub.com/sydney-runkle) in [#​9550](https://togithub.com/pydantic/pydantic/pull/9550) ##### Fixes - Fix u style unicode strings in python [@​samuelcolvin](https://togithub.com/samuelcolvin) in [pydantic/jiter#110](https://togithub.com/pydantic/jiter/pull/110)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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This PR has been generated by Mend Renovate. View repository job log here.

[github-actions[bot]]

Test coverage for 8734b9de7e284f5f77d5fb6e820a45232d1d51bd

Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
src/charm.py        317     27     78     12    90%   181, 189-190, 202, 334->342, 375->380, 392, 574-576, 581-582, 594-596, 601-602, 614-616, 639-641, 683->exit, 693->exit, 723-729, 755->exit, 769-770, 780->exit, 794
src/database.py      29      1      8      1    95%   56
-------------------------------------------------------------
TOTAL               346     28     86     13    91%

Static code analysis report

Run started:2024-06-03 19:28:43.514162

Test results:
    No issues identified.

Code scanned:
    Total lines of code: 2043
    Total lines skipped (#nosec): 3
    Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
    Total issues (by severity):
        Undefined: 0
        Low: 0
        Medium: 0
        High: 0
    Total issues (by confidence):
        Undefined: 0
        Low: 0
        Medium: 0
        High: 0
Files skipped (0):