feat: update Custom Domain Subtext for clarity

[salevine]

Description

Update the sub text description on the Custom Domain label for clarity

Fixes 8476

Automation

/ok-to-test tags="@tag.Perf"

🔍 Cypress test results

Caution

🔴 🔴 🔴 Some tests have failed.
Workflow run: https://github.com/appsmithorg/appsmith/actions/runs/20588545481
Commit: aefc643
Cypress dashboard.
Tags: @tag.Perf
Spec:
The following are new failures, please fix them before merging the PR:

1. cypress/e2e/Regression/ServerSide/GenerateCRUD/MySQL2_Spec.ts

List of identified flaky tests.

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Tue, 30 Dec 2025 04:36:41 UTC

Communication

Should the DevRel and Marketing teams inform users about this change?

• Yes
• No

Summary by CodeRabbit

Release Notes

• Documentation
  • Clarified custom domain configuration guidance to specify that domains should be entered without the HTTP/HTTPS protocol.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

Updated the help text for the APPSMITH_CUSTOM_DOMAINS setting in the instance settings configuration to clarify that domain values should exclude HTTP/HTTPS protocols. This is a documentation-only change affecting a single file with no functional modifications.

Changes

Cohort / File(s)	Summary
Instance Settings Documentation app/client/src/ce/pages/AdminSettings/config/instanceSettings.ts	Updated subText for APPSMITH_CUSTOM_DOMAINS setting to clarify that custom domains should be specified without protocol prefixes (HTTP/HTTPS)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🌐 A domain walks in without its coat,
No HTTP-y protocols afloat,
Just the bare address, clean and neat,
Help text updated, now complete! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title clearly describes the main change: updating the Custom Domain subtext for clarity, which aligns with the actual code modification.
Description check	✅ Passed	The PR description includes the required issue reference, automation tags, test results, and communication confirmation. All essential sections are present.

✨ Finishing touches

• 📝 Generate docstrings

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[tomjose92]

Changes look good to go

[github-actions]

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