deps: update python docker tag to v3.12.3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
python	final	patch	3.12.2-alpine -> 3.12.3-alpine

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Configuration

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.34%. Comparing base (213204b) to head (f2fe53c).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3406 +/- ## ========================================== - Coverage 85.36% 85.34% -0.02% ========================================== Files 167 167 Lines 7412 7412 ========================================== - Hits 6327 6326 -1 - Misses 798 799 +1 Partials 287 287 ``` [see 3 files with indirect coverage changes](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | [Flag](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | Coverage Δ | | |---|---|---| | [certificate-operator](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | `69.23% <ø> (ø)` | | | [component-tests](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | `58.12% <ø> (-0.66%)` | :arrow_down: | | [lifecycle-operator](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | `83.46% <ø> (ø)` | | | [metrics-operator](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | `88.32% <ø> (ø)` | | | [scheduler](https://app.codecov.io/gh/keptn/lifecycle-toolkit/pull/3406/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn) | `34.74% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=keptn#carryforward-flags-in-the-pull-request-comment) to find out more.

[odubajDT]

security scan https://github.com/keptn/lifecycle-toolkit/actions/runs/8684458427