Backport PR pandas-dev#27689: DOC: 0.25 fixups

Author: TomAugspurger

doc/source/whatsnew/index.rst

@@ -16,6 +16,7 @@ Version 0.25
 .. toctree::
    :maxdepth: 2
 
+   v0.25.1
    v0.25.0
 
 Version 0.24

doc/source/whatsnew/v0.25.0.rst

@@ -1267,4 +1267,4 @@ Other
 Contributors
 ~~~~~~~~~~~~
 
-.. contributors:: 0.24.x..HEAD
+.. contributors:: v0.24.x..HEAD

doc/source/whatsnew/v0.25.1.rst

@@ -1,7 +1,3 @@
-:orphan:
-
-.. TODO. Remove the orphan tag.
-
 .. _whatsnew_0251:
 
 What's new in 0.25.1 (July XX, 2019)
@@ -166,6 +162,4 @@ Other
 Contributors
 ~~~~~~~~~~~~
 
-.. TODO. Change to v0.25.0..HEAD
-
-.. contributors:: HEAD..HEAD
+.. contributors:: v0.25.0..HEAD