doc: document Fiber.current

It's always been supported (since it's just an eval), but make
it explicit.  We'll also drop the Actor.current example since
both Rubinius and Revactor seem dead and Ractor (Guild) is
probably coming...

1 files changed, 1 insertions, 1 deletions

diff --git a/README b/README
index c90dd1a..cdb8fba 100644
--- a/README
+++ b/README
@@ -89,7 +89,7 @@ that receives a "<<" method:
 * $ip - X-Forwarded-For request header if available, $remote_addr if not
 * $pid - process ID of the current process
 * $e{Thread.current} - Thread processing the request
-* $e{Actor.current} - Actor processing the request (Revactor or Rubinius)
+* $e{Fiber.current} - Fiber processing the request
 * $env{variable_name} - any Rack environment variable (e.g. rack.url_scheme)
 
 == REQUIREMENTS