[Snyk] Security upgrade python from 3.10.0rc1-slim to 3.11.0a1-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:3.11.0a1-slim, as this image has only 38 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	Use After Free SNYK-DEBIAN11-GLIBC-1296898	No Known Exploit
	500	Use After Free SNYK-DEBIAN11-GLIBC-1296898	No Known Exploit
	300	NULL Pointer Dereference SNYK-DEBIAN11-KRB5-1568499	No Known Exploit
	300	NULL Pointer Dereference SNYK-DEBIAN11-KRB5-1568499	No Known Exploit
	300	Use of a Broken or Risky Cryptographic Algorithm SNYK-DEBIAN11-LIBGCRYPT20-1582897	No Known Exploit

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[sonarcloud[bot]]

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