chore: update docs with minimum severity for security issues in gates [LK-1509]

[joanasteodoro]

👀 Live preview

🚧 To do

• If relevant, include the Jira issue key at the end of the pull request title
• Perform a self-review of the changes
• Fix any issues reported by the CI/CD

[github-actions]

Overall readability score: 53.08 (🟢 +0)

File	Readability
adjusting-quality-gates.md	59.26 (🔴 -0.13)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
adjusting-quality-gates.md	59.26	44.75	11.03	11.6	11.31	7.19
	🔴 -0.13	🔴 -0.3	🔴 -0.04	🔴 -0.1	🟢 +0	🟢 +0.04

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	53.08	42.94	10.95	12.69	12.63	7.99
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less