Fix example in API docs
setTag -> addTag
@@ -272,7 +272,7 @@ is used as a tag key as it can lead to mapping explosions.
[source,java]
----
-transaction.setTag("foo", "bar");
+transaction.addTag("foo", "bar");
----
* `key`: The tag key
@@ -537,7 +537,7 @@ is used as a tag key as it can lead to mapping explosions.
[source,java]
----
-span.setTag("foo", "bar");
+span.addTag("foo", "bar");
----
* `key`: The tag key
