chore: add changelog for fix

.chloggen/fix_validation-stabilizationWindowSeconds.yaml

@@ -0,0 +1,18 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# 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: collector-webhook
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Fixed validation of `stabilizationWindowSeconds` in autoscaler behaviour"
+
+# One or more tracking issues related to the change
+issues: [3345]
+
+# (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: |
+  The validation of `stabilizationWindowSeconds` in the `autoscaler.behaviour.scale[Up|Down]` incorrectly rejected 0 as an invalid value.
+  This has been fixed to ensure that the value is validated correctly (should be >=0 and <=3600) and the error messsage has been updated to reflect this.