adds readme for system properties

Author: Abhishekkr3003

instrumentation/aerospike-client/README.md

@@ -0,0 +1,6 @@
+# Settings for the Aerospike-Client instrumentation
+
+| System property                                               | Type    | Default | Description                                                          |
+|---------------------------------------------------------------|---------|---------|----------------------------------------------------------------------|
+| `otel.instrumentation.aerospike.experimental-span-attributes` | Boolean | `false` | Enable the capture of experimental Aerospike client span attributes. |
+| `otel.instrumentation.aerospike.experimental-metrics`         | Boolean | `false` | Enable the recording of experimental Aerospike client metrics        |