fix: update broken link to tx-builder guide

[dasanra]

What it solves

Fix a broken link to tx-builder guide

Changelog

• fix: update broken link to tx-builder guide

Checklist

• I've followed all safe-docs pull request rules

---

Note

Low Risk
Docs-only change that updates a single external link; no runtime behavior affected.

Overview
Fixes the tx-builder section of pages/advanced/cli-reference/unattended-commands.mdx by updating the Transaction Builder help article link to the current Safe help URL.

^{Written by Cursor Bugbot for commit 36de6e3. This will update automatically on new commits. Configure here.}

[github-actions]

Branch preview

✅ Deployed successfully in branch deployment:

https://update_broken_link--docs.review.5afe.dev

[github-actions]

Overall readability score: 36.86 (🟢 +0)

File	Readability
unattended-commands.mdx	62.44 (🟢 +0)

View detailed metrics

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

File	Readability	FRE	GF	ARI	CLI	DCRS
unattended-commands.mdx	62.44	48.5	9.85	10.4	11.48	7.49
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	36.86	31.52	13.14	16.32	14.75	8.71
	🟢 +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