new version format

Author: jcollins-g

.travis.yml

@@ -2,7 +2,7 @@ language: dart
 sudo: false
 dart:
   - stable
-  - "dev/raw/2.9.0-dev.5.0"
+  - "dev/raw/2.9.0-5.0-dev"
 env:
   - DARTDOC_BOT=main
   - DARTDOC_BOT=flutter

appveyor.yml

@@ -7,7 +7,7 @@ branches:
     - master
 
 install:
-  - ps: wget https://storage.googleapis.com/dart-archive/channels/dev/release/2.9.0-dev.5.0/sdk/dartsdk-windows-x64-release.zip -OutFile dart-sdk.zip
+  - ps: wget https://storage.googleapis.com/dart-archive/channels/dev/release/2.9.0-5.0.dev/sdk/dartsdk-windows-x64-release.zip -OutFile dart-sdk.zip
   - cmd: echo "Unzipping dart-sdk..."
   - cmd: 7z x dart-sdk.zip -o"C:\tools" -y > nul
   - cmd: del dart-sdk.zip