add changelog entry

Author: lucacasonato

.chloggen/deno_auto_instrumentation.yaml

@@ -0,0 +1,18 @@
+# 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. collector, target allocator, auto-instrumentation, opamp, github action)
+component: 'auto-instrumentation'
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add support for auto-instrumentation of Deno applications"
+
+# One or more tracking issues related to the change
+issues: [3613]
+
+# (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.
+# Use pipe (|) for multiline entries.
+subtext: |
+  Deno auto-instrumentation is disabled by default and must be enabled with the `--enable-deno-instrumentation` flag.
+  OpenTelemetry support in Deno is experimental and requires Deno 2.1.5 or later, and passing of the `--unstable-otel` flag to the workload.