chore: add necessary write permission to closed issue message actions workflow

[atierian]

Description

The closed-issue-message action added in #3374 doesn't have the necessary permissions to post a comment to an issue.

Example failure: https://github.com/aws-amplify/amplify-swift/actions/runs/7172825929/job/19530846804

This PR adds the write permission to the workflow to allow the action to carry out its duties.
This change mirrors the existing permissions used by other comment actions e.g. new_issue_maintainer

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: 68 lines in your changes are missing coverage. Please review.

Comparison is base (f8c5df9) 67.91% compared to head (d3b158e) 68.09%.
Report is 10 commits behind head on main.

Files	Patch %	Lines
...ify/Categories/DataStore/Query/QueryOperator.swift	0.00%	36 Missing ⚠️
...ePlugin/Migration/ModelSyncMetadataMigration.swift	81.81%	10 Missing ⚠️
...fy/Categories/DataStore/Query/QueryPredicate.swift	0.00%	9 Missing ⚠️
...Categories/DataStore/Model/Temporal/Temporal.swift	60.00%	2 Missing ⚠️
...Core/Sync/ModelSync/ModelSyncMetadata+Schema.swift	0.00%	2 Missing ⚠️
...PluginsCore/Sync/ModelSync/ModelSyncMetadata.swift	0.00%	2 Missing ⚠️
...Plugin/Sync/InitialSync/InitialSyncOperation.swift	96.22%	2 Missing ⚠️
...ataStore/Model/Internal/Model+DateFormatting.swift	0.00%	1 Missing ⚠️
...ify/Categories/DataStore/Model/Temporal/Date.swift	66.66%	1 Missing ⚠️
...Categories/DataStore/Model/Temporal/DateTime.swift	75.00%	1 Missing ⚠️
... and 2 more

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3419      +/-   ##
==========================================
+ Coverage   67.91%   68.09%   +0.18%     
==========================================
  Files        1083     1086       +3     
  Lines       36106    36304     +198     
==========================================
+ Hits        24520    24721     +201     
+ Misses      11586    11583       -3     

Flag	Coverage Δ
API_plugin_unit_test	67.07% <ø> (ø)
AWSPluginsCore	64.38% <0.00%> (-0.07%)	⬇️
Amplify	48.19% <66.66%> (+0.43%)	⬆️
Analytics_plugin_unit_test	81.16% <ø> (ø)
Auth_plugin_unit_test	79.06% <100.00%> (-0.16%)	⬇️
CoreMLPredictions_plugin_unit_test	59.44% <ø> (ø)
DataStore_plugin_unit_test	80.93% <90.90%> (+1.16%)	⬆️
Geo_plugin_unit_test	70.75% <ø> (ø)
Logging_plugin_unit_test	63.09% <ø> (ø)
Predictions_plugin_unit_test	37.29% <ø> (ø)
PushNotifications_plugin_unit_test	87.03% <ø> (ø)
Storage_plugin_unit_test	78.10% <ø> (ø)
unit_tests	68.09% <77.25%> (+0.18%)	⬆️

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