Adds release notes for 3.10.2

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#6849
#6861

release-notes/docs/3.10.2.md

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+# 3.10.1 Release Notes
+
+### Supported software
+
+There are no required changes to the [supported software matrix](https://docs.communityhealthtoolkit.org/core/overview/supported-software/) from `3.0.0`.
+
+| Node | CouchDB | Browsers | SMS bridge | Android | medic-android | medic-couch2pg |
+|----|----|----|----|----|----|---|
+| 8.11+ | 2.1+ | Chrome 53+, Firefox latest | medic-gateway | 4.4+ | 0.4.5+ | 3.0+ |
+
+### Bug fixes
+
+- [cht-core#6700](https://github.com/medic/cht-core/issues/6700): For targets without `idType`, the winner emission is not deterministic