chore: update dependabot configuration [skip ci]

Author: github-actions[bot]

.github/dependabot.yml

@@ -88,6 +88,7 @@ updates:
       - "/src/Instrumentation/Yii"
       - "/src/Logs/Monolog"
       - "/src/MetaPackages/opentelemetry"
+      - "/src/Propagation/Instana"
       - "/src/Propagation/ServerTiming"
       - "/src/Propagation/TraceResponse"
       - "/src/ResourceDetectors/Azure"