Update CHANGELOG.md

Co-authored-by: Leighton Chen <[email protected]>

Author: owais

CHANGELOG.md

@@ -21,7 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-sdk` Fixed bugs (#2041, #2042 & #2045) in Span Limits
   ([#2044](https://github.com/open-telemetry/opentelemetry-python/pull/2044))
 - `opentelemetry-sdk` Treat limit even vars set to empty values as unset/unlimited.
-  ([#2044](https://github.com/open-telemetry/opentelemetry-python/pull/2054))
+  ([#2054](https://github.com/open-telemetry/opentelemetry-python/pull/2054))
 - `opentelemetry-api` Attribute keys must be non-empty strings.
   ([#2057](https://github.com/open-telemetry/opentelemetry-python/pull/2057))
 

opentelemetry-sdk/src/opentelemetry/sdk/trace/__init__.py

@@ -553,7 +553,7 @@ class SpanLimits:
             the specified length will be truncated.
     """
 
-    UNSET = "unset"
+    UNSET = -1
 
     def __init__(
         self,