DOC: add doc notes

docs/source/upcoming_release_notes/1304-chin-rtds.rst

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+1304 chin-rtds
+#################
+
+API Breaks
+----------
+- N/A
+
+Library Features
+----------------
+- N/A
+
+Device Features
+---------------
+- `KBOMirrorHE` gets 2 new RTD readouts for RTDs installed on the mirror inside vaccum.
+
+New Devices
+-----------
+- N/A
+
+Bugfixes
+--------
+- reorder some components in `KBOMirrorHE`
+
+Maintenance
+-----------
+- `FFMirrorZ` same type of RTDs on mirrors, so standardize naming.
+
+Contributors
+------------
+- nrwslac