[Snyk] Security upgrade python from 3.11.7 to 3.11.9

[perdelt]

Snyk has created this PR to fix 2 vulnerabilities in the dockerfile dependencies of this project.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Snyk changed the following file(s):

• images/benchmarker_dbmsbenchmarker/Dockerfile_template

We recommend upgrading to python:3.11.9, as this image has only 198 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Time-of-check Time-of-use (TOCTOU) SNYK-DEBIAN12-POSTGRESQL15-7654156	686
	Time-of-check Time-of-use (TOCTOU) SNYK-DEBIAN12-POSTGRESQL15-7654156	686
	Out-of-bounds Write SNYK-DEBIAN12-GDKPIXBUF-6207393	614
	Out-of-bounds Write SNYK-DEBIAN12-GDKPIXBUF-6207393	614
	Out-of-bounds Write SNYK-DEBIAN12-GDKPIXBUF-6207393	614

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[!IMPORTANT]

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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