Updated readme

Author: HeenaBansal20

src/Exporter/Instana/README.md

@@ -26,7 +26,7 @@ curl -s https://getcomposer.org/installer | php
 Install via Composer
 
 ```bash
-composer require instana/opentelemetry-exporter-instana
+composer require open-telemetry/opentelemetry-exporter-instana
 ```
 
 ## Usage
@@ -73,4 +73,4 @@ $tracerProvider->shutdown();
 
 ## Issues
 
-This repo is maintained by IBM Instana and is read-only. Issues should be reported as part of standard [Instana product support](https://www.ibm.com/support/pages/instana-support).
+This repo is maintained by IBM Instana and is read-only. Issues should be reported as part of standard [Instana product support](https://www.ibm.com/support/pages/instana-support).