Hardcoding image path in 12 days of HPC jinja template

[Sparrow0hawk]

The jinja template for the 12 days of HPC blog post hardcodes the path for where it expects the images we be:

arcleeds.github.io/scripts/templates/12dayshpc-template.md.j2

Line 72 in 4127b45

<img src="{{ "/images/blog/12dayshpc-2022/" ~ img }}"

To keep things tidy we keep the images in a subfolder of images for each year's 12 days of HPC but could we remove this hardcoding from the template directly and control the path in blog_template.py file?