[Snyk] Security upgrade python from 3.10.0rc1-slim to 3.11.0a4-slim

[snyk-bot]

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

Changes included in this PR

• ruleserver/app/Dockerfile

We recommend upgrading to python:3.11.0a4-slim, as this image has only 62 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	500	Integer Overflow or Wraparound SNYK-DEBIAN11-EXPAT-2359255	No Known Exploit
	500	Integer Overflow or Wraparound SNYK-DEBIAN11-EXPAT-2384928	No Known Exploit
	571	Exposure of Resource to Wrong Sphere SNYK-DEBIAN11-EXPAT-2403510	No Known Exploit
	571	Improper Encoding or Escaping of Output SNYK-DEBIAN11-EXPAT-2403512	No Known Exploit
	571	Integer Overflow or Wraparound SNYK-DEBIAN11-EXPAT-2406127	No Known Exploit

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[sonarcloud[bot]]

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