Add note for zero balance API issue

[evilnick]

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[github-actions]

Overall readability score: 44.7 (🟢 +0)

File	Readability
openai-api-issues.md	50.49 (🔴 -2.42)

View detailed metrics

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

File	Readability	FRE	GF	ARI	CLI	DCRS
openai-api-issues.md	50.49	40.99	10.7	15.6	13.23	7.25
	🔴 -2.42	🟢 +5.62	🔴 -1.22	🔴 -0.9	🟢 +0.58	🔴 -0.24

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	44.7	35.58	11.38	14.61	14.22	8.43
	🟢 +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