fix

Most likely a temporary fix for the issue where v4.78.0 ubuntu images were not including dotnet.

Author: NoelStephensUnity

.yamato/project.metafile

@@ -38,13 +38,13 @@ test_platforms:
     default:
         - name: ubuntu
           type: Unity::VM
-          image: package-ci/ubuntu-22.04:v4
+          image: package-ci/ubuntu-22.04:v4.77.0
           flavor: b1.large
           standalone: StandaloneLinux64
     desktop:
         - name: ubuntu
           type: Unity::VM
-          image: package-ci/ubuntu-22.04:v4
+          image: package-ci/ubuntu-22.04:v4.77.0
           flavor: b1.large
           smaller_flavor: b1.medium
           standalone: StandaloneLinux64