chore: add visible confirmation when unassigning issues (hiero-ledger#1535)

Signed-off-by: prishajaiswal75 <prisha.jaiswal.btech2023@sitpune.edu.in>
Signed-off-by: prishajaiswal75 <164599457+prishajaiswal75@users.noreply.github.com>

Author: prishajaiswal75

.github/scripts/bot-unassign-on-comment.js

@@ -119,14 +119,19 @@ module.exports = async ({ github, context }) => {
       assignees: [username],
     });
 
-    // Add hidden marker to track unassign
+    const confirmationMessage =
+      `✅ **@${username}, you’ve been unassigned from this issue.**\n\n` +
+      `Thanks for letting us know! If you’d like to work on something else, ` +
+      `feel free to browse our open issues.`;
+
     await github.rest.issues.createComment({
       owner,
       repo,
       issue_number: issueNumber,
-      body: marker,
+      body: `${marker}\n\n${confirmationMessage}`,
     });
 
+
    console.log('[unassign] Unassign completed successfully', {
       requester: username,
       issueNumber,

CHANGELOG.md

@@ -114,6 +114,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Added technical docstrings and hardening (set -euo pipefail) to the pr-check-test-files.sh script (#1336)
 - Added prompt for coderabbit to review `Query` and it's sub-classes.
 - Add StakingInfo class ([1364](https://github.com/hiero-ledger/hiero-sdk-python/issues/1364))
+- Added a visible confirmation comment when a user unassigns themselves from an issue (#1506)
 - Added first-class support for EVM address aliases in `AccountId`, including parsing, serialization, Mirror Node population helpers.
 
 ### Changed