fix: add towncrier changelog fragment

Author: Manvi2402

.changelog/4530.changed

@@ -10,10 +10,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 > Use [this search for a list of all CHANGELOG.md files in this repo](https://github.com/search?q=repo%3Aopen-telemetry%2Fopentelemetry-python-contrib+path%3A**%2FCHANGELOG.md&type=code).
 
 ## Unreleased
-### Changed
-- `opentelemetry-instrumentation`: Batch all packages into a single `pip install` call in `bootstrap.py` to improve performance
-  ([#4530](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4530))
-  
 ### Added
 
 - Add `BaggageLogProcessor` to `opentelemetry-processor-baggage`