update docs

Author: Duncan-tree-zhou

instrumentation-annotations-incubator/src/main/java/io/opentelemetry/instrumentation/annotations/incubator/Counted.java

@@ -17,8 +17,7 @@
  * <p>By default, the Counter instrument will have the following attributes:
  *
  * <ul>
- *   <li><b>code.namespace:</b> The fully qualified name of the class whose method is invoked.
- *   <li><b>code.function:</b> The name of the annotated method.
+ *   <li><b>code.function.name:</b> The fully qualified name of the class whose method is invoked.
  *   <li><b>error.type:</b> This is only present if an Exception is thrown, and contains the {@link
  *       Class#getName name} of the Exception class.
  * </ul>

instrumentation-annotations-incubator/src/main/java/io/opentelemetry/instrumentation/annotations/incubator/Timed.java

@@ -17,8 +17,7 @@
  * <p>By default, the Histogram instrument will have the following attributes:
  *
  * <ul>
- *   <li><b>code.namespace:</b> The fully qualified name of the class whose method is invoked.
- *   <li><b>code.function:</b> The name of the annotated method.
+ *   <li><b>code.function.name:</b> The fully qualified name of the class whose method is invoked.
  *   <li><b>error.type:</b> This is only present if an Exception is thrown, and contains the {@link
  *       Class#getName name} of the Exception class.
  * </ul>