Minor GitHub workflow changes

[kellertk]

Issue #, if available: None

Description of changes:

Based on customer feedback we are making 2 small changes to our GitHub issue automation:

1. The timelines on issue closure are too short, especially over holidays or weekends.
2. The closed issue message is too loud and too full of emoji.

Check all that applies:

• [x] Did a review by yourself.
• [ ] Added proper tests to cover this PR. (If tests are not applicable, explain.)
• [x] Checked if this PR is a breaking (APIs have been changed) change.
• [x] Checked if this PR will not introduce cross-platform inconsistent behavior.
• [x] Checked if this PR would require a ReadMe/Wiki update.

Check which platforms you have built SDK on to verify the correctness of this PR.

• [ ] Linux
• [ ] Windows
• [ ] Android
• [ ] MacOS
• [ ] IOS
• [ ] Other Platforms

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