fix version dev -> rc

Author: boverhof

docs/source/conf.py

@@ -94,9 +94,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = "3.28.rc0"
+version = "3.28.0rc0"
 # The full version, including alpha/beta/rc tags.
-release = "3.28.rc0"
+release = "3.28.0rc0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.