[Rails Guides] clarify `ActiveRecord::ConnectionTimeoutError`

Original:
    * ActiveRecord::ConnectionTimeoutError - could not obtain a database
      connection within 5 seconds. The max pool size is currently 5;
      consider increasing it:

Modified version:
    * ActiveRecord::ConnectionTimeoutError - could not obtain a database
      connection within 5.000 seconds (waited 5.000 seconds)

[ci skip]

1 files changed, 1 insertions, 1 deletions

diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index d63317433d..fda82d81ff 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -1096,7 +1096,7 @@ you and wait for a connection from the pool. If it cannot get a connection, a
 timeout error similar to that given below will be thrown.
 
 ```ruby
-ActiveRecord::ConnectionTimeoutError - could not obtain a database connection within 5 seconds. The max pool size is currently 5; consider increasing it:
+ActiveRecord::ConnectionTimeoutError - could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)
 ```
 
 If you get the above error, you might want to increase the size of the