Add changelog entry and make BoundedAttributes mutable

Author: shevisj

opentelemetry-exporter-gcp-trace/CHANGELOG.md

@@ -4,6 +4,8 @@
 
 - Add support for Python 3.11
   ([#240](https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/pull/240))
+- Upgrade `opentelemetry-api` dependency to version 1.4 or newer
+  ([#238](https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/pull/238))
 
 ## Version 1.4.0
 

opentelemetry-exporter-gcp-trace/src/opentelemetry/exporter/cloud_trace/__init__.py

@@ -478,7 +478,7 @@ def _extract_attributes(
     """Convert span.attributes to dict."""
     attributes_dict: BoundedAttributes[
         str, trace_types.AttributeValue
-    ] = BoundedAttributes(num_attrs_limit)
+    ] = BoundedAttributes(num_attrs_limit, immutable=False)
     invalid_value_dropped_count = 0
     for ot_key, ot_value in attrs.items() if attrs else []:
         key = _truncate_str(ot_key, MAX_ATTR_KEY_BYTES)[0]