[Snyk] Security upgrade ubuntu from mantic-20231011 to 23.10 (#4788)

<p>This PR was automatically created by Snyk using the credentials of a real user.</p><br />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 


- website/Dockerfile

We recommend upgrading to `ubuntu:23.10`, as this image has only 8 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      |
| :------:                                                                                                                 | :--------------------  | :----                                                                     | :---------------      |
| ![medium severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/m.png "medium severity")   | **586**  | CVE-2023-5981 <br/>[SNYK-UBUNTU2310-GNUTLS28-6069047](https://snyk.io/vuln/SNYK-UBUNTU2310-GNUTLS28-6069047)   | No Known Exploit   |
| ![medium severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/m.png "medium severity")   | **586**  | CVE-2023-47038 <br/>[SNYK-UBUNTU2310-PERL-6085371](https://snyk.io/vuln/SNYK-UBUNTU2310-PERL-6085371)   | No Known Exploit   |
| ![low severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/l.png "low severity")   | **364**  | Out-of-bounds Write <br/>[SNYK-UBUNTU2310-PROCPS-5972730](https://snyk.io/vuln/SNYK-UBUNTU2310-PROCPS-5972730)   | No Known Exploit   |
| ![low severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/l.png "low severity")   | **364**  | Out-of-bounds Write <br/>[SNYK-UBUNTU2310-PROCPS-5972730](https://snyk.io/vuln/SNYK-UBUNTU2310-PROCPS-5972730)   | No Known Exploit   |
| ![medium severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/m.png "medium severity")   | **371**  | CVE-2023-39804 <br/>[SNYK-UBUNTU2310-TAR-6096092](https://snyk.io/vuln/SNYK-UBUNTU2310-TAR-6096092)   | No Known Exploit   |



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[//]: # 'snyk:metadata:{"prId":"9649c902-9ae1-4256-a579-12bf5ee4a730","prPublicId":"9649c902-9ae1-4256-a579-12bf5ee4a730","dependencies":[{"name":"ubuntu","from":"mantic-20231011","to":"23.10"}],"packageManager":"dockerfile","projectPublicId":"be35e6c9-5393-4702-af3c-f4aebb53488e","projectUrl":"https://app.snyk.io/org/alcion/project/be35e6c9-5393-4702-af3c-f4aebb53488e?utm_source=github-enterprise&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-UBUNTU2310-GNUTLS28-6069047","SNYK-UBUNTU2310-PERL-6085371","SNYK-UBUNTU2310-TAR-6096092","SNYK-UBUNTU2310-PROCPS-5972730"],"upgrade":["SNYK-UBUNTU2310-GNUTLS28-6069047","SNYK-UBUNTU2310-PERL-6085371","SNYK-UBUNTU2310-PROCPS-5972730","SNYK-UBUNTU2310-PROCPS-5972730","SNYK-UBUNTU2310-TAR-6096092"],"isBreakingChange":false,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore"],"priorityScoreList":[586,586,371,364],"remediationStrategy":"vuln"}'

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website/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:mantic-20231011
+FROM ubuntu:23.10
 LABEL MAINTAINER="Niraj Tolia"
 
 ARG DEBIAN_FRONTEND=noninteractive