fix: yamato python version bump to fix standards job (#915)

Author: fernando-cortez

.yamato/project-standards.yml

@@ -9,7 +9,10 @@ standards_{{ projects.first.name }}:
   commands:
     - dotnet --version
     - dotnet format --version
-    - pip install unity-downloader-cli --upgrade --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple
+    - sudo add-apt-repository -y ppa:deadsnakes/ppa
+    - sudo apt update
+    - sudo apt install -y python3.9
+    - python3 -m pip install unity-downloader-cli --upgrade
     - unity-downloader-cli -u {{ projects.first.test_editors.first }} -c editor --wait --fast
     - .Editor/Unity -batchmode -nographics -logFile - -executeMethod Packages.Rider.Editor.RiderScriptEditor.SyncSolution -projectPath {{ projects.first.path }} -quit
     - dotnet run --project dotnet-tools/netcode.standards -- --project={{ projects.first.path }} --check

CHANGELOG.md

@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 Additional documentation and release notes are available at [Multiplayer Documentation](https://docs-multiplayer.unity3d.com).
 
+## [unreleased] yyyy-mm-dd
+
+### Fixed
+* Internal standards job fix (#915)
+
 ## [2.5.0] - 2024-04-18
 
 ### Changed