Changelog entry for JSON support in nr-assistant

[Steve-Mcl]

Description

Adds changelog entry for new JSON support

Related Issue(s)

#2346

Checklist

• I have read the contribution guidelines
• I have considered the performance impact of these changes
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated

[Steve-Mcl]

Not to be published until after nr-assistant 0.1.1 release is cut

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 17.1%, saving 12.76 KB.

Filename	Before	After	Improvement	Visual comparison
src/changelog/2024/07/images/ask-assistant-json-1a.png	9.78 KB	7.71 KB	-21.2%	View diff
src/changelog/2024/07/images/ask-assistant-json-1b.png	23.87 KB	20.00 KB	-16.2%	View diff
src/changelog/2024/07/images/ask-assistant-json-2a.png	11.22 KB	8.55 KB	-23.8%	View diff
src/changelog/2024/07/images/ask-assistant-json-2b.png	29.63 KB	25.48 KB	-14.0%	View diff

1230 images did not require optimisation.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 17%, saving 6.00 KB.

Filename	Before	After	Improvement	Visual comparison
src/changelog/2024/07/images/ask-assistant-json-1a.png	9.40 KB	7.41 KB	-21.2%	View diff
src/changelog/2024/07/images/ask-assistant-json-1b.png	25.89 KB	21.88 KB	-15.5%	View diff

1232 images did not require optimisation.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 16.9%, saving 3.77 KB.

Filename	Before	After	Improvement	Visual comparison
src/changelog/2024/07/images/assistant-update-nr3.png	13.28 KB	11.12 KB	-16.2%	View diff
src/changelog/2024/07/images/assistant-update-nr4.png	9.05 KB	7.43 KB	-17.9%	View diff

1234 images did not require optimisation.