chore: expand inactivity bot messages to include /unassign info (#1555)

Signed-off-by: Rajkoli143 <2024.rajk@isu.ac.in>

Author: Rajkoli145

.github/scripts/bot-inactivity-unassign.sh

@@ -134,7 +134,11 @@ Hi @$USER, this is InactivityBot 👋
 You were assigned to this issue **${ASSIGNED_AGE_DAYS} days** ago, and there is currently no open pull request linked to it.
 To keep the backlog available for active contributors, I'm unassigning you for now.
 
-If you'd like to continue working on this later, feel free to get re-assigned or comment here and we'll gladly assign it back to you. 🙂
+If you're no longer interested, no action is needed.
+
+**Tip:** You can comment \`/unassign\` on any issue to proactively step away before this bot kicks in.
+
+If you'd like to continue working on this later, feel free to comment \`/assign\` to get re-assigned. We'll gladly assign it back to you. 🙂
 EOF
 )
           gh issue comment "$ISSUE" --repo "$REPO" --body "$MESSAGE" || echo "WARN: couldn't post comment (gh error)"
@@ -188,7 +192,11 @@ Hi @$USER, this is InactivityBot 👋
 
 This pull request has had no new commits for **${PR_AGE_DAYS} days**, so I'm closing it and unassigning you from the linked issue to keep the backlog healthy.
 
-You're very welcome to open a new PR or ask to be re-assigned when you're ready to continue working on this. 🚀
+If you're no longer interested, no action is needed.
+
+**Tip:** You can comment \`/unassign\` on any issue to proactively step away before this bot kicks in.
+
+If you'd like to continue working on this later, feel free to comment \`/assign\` on the issue to get re-assigned, and open a new PR when you're ready. 🚀
 EOF
 )
           gh pr comment "$PR_NUM" --repo "$REPO" --body "$MESSAGE" || echo "WARN: couldn't comment on PR"

CHANGELOG.md

@@ -6,8 +6,6 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 ## [Unreleased]
 
-### Changed
-
 ### Tests
 - Formatted contract unit tests with black for consistent style. (#1523)
 - Format account test files with Black (#1519)
@@ -119,6 +117,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Added first-class support for EVM address aliases in `AccountId`, including parsing, serialization, Mirror Node population helpers.
 
 ### Changed
+- Expanded inactivity bot messages to include `/unassign` command information for contributors (#1555)
 - Update the acceptance criteria wording in the issue templates to improve clarity and consistency for contributors (#1491)
 - Add return type hint to `AccountId.__repr__` for type consistency. (#1503)
 - Good First Issue template to have more guidance and renamed other templates for consistency with upstream 
@@ -232,7 +231,6 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 ### Removed
 
 - Deleted `examples/utils.py` as its helper functions are no longer needed. ([#1263](https://github.com/hiero-ledger/hiero-sdk-python/issues/1263))
-- Transaction byte generation to respect valid `node_account_ids` during `external signing` and `manual freezing workflows`, preventing execution failures caused by node mismatches.
 
 ### Breaking Change