Jinja <3.1.5 security vulnerability

https://github.com/DiamondLightSource/blueapi/security/dependabot/12

```An oversight in how the Jinja sandboxed environment detects calls to str.format allows an attacker that controls the content of a template to execute arbitrary Python code.

To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates.

Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to store a reference to a malicious string's format method, then pass that to a filter that calls it. No such filters are built-in to Jinja, but could be present through custom filters in an application. After the fix, such indirect calls are also handled by the sandbox.```

Python-copier-template should update the version of Jinja, even if it appears to not be directly relevant.
Python-copier-template should also enable security scanning of dependencies, so that issues are caught ASAP and handled in the appropriate place

從儲存庫的相依性設定和 CI 設定開始；該 issue 連結到 Dependabot alert 12，並要求更新 Jinja 以及進行相依性安全性掃描。確認漏洞已獲得修補，且掃描已啟用，能夠偵測未來的相依性問題。

由索引模型根據 Issue 內容生成。