appveyor.yml in pdd-0.17.8 vs appveyor.yml in pdd-0.17.9

- old
+ new

@@ -6,10 +6,10 @@
     - master
   except:
     - gh-pages
 os: Windows Server 2012
 install:
-  - cmd: SET PATH=C:\Ruby200\bin;%PATH%
+  - cmd: SET PATH=C:\Ruby23-x64\bin;%PATH%
   - cmd: ruby --version
   - cmd: git --version
 build_script:
   - bundle update
   - bundle install