add changelog entry

unreleased/dt-updates.yaml

@@ -0,0 +1,15 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: dynatraceexporter
+
+# A brief description of the change
+note: Improve serialization of certain Instrument/Temporality pairings
+
+# One or more tracking issues related to the change
+issues: [ 11828 ]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+subtext: