Update ubuntu image

Author: theo-at-unity

.yamato/postprocessing-linux-vulkan.yml

@@ -2,7 +2,7 @@ PostProcessing_Linux_Vulkan_playmode_mono_Linear_trunk:
     name: PostProcessing on Linux_Vulkan_playmode_mono_Linear on version trunk
     agent:
         type: Unity::VM::GPU
-        image: desktop/ubuntu-22.04-desktop:v2.5184455
+        image: desktop/ubuntu-22.04-desktop:v2.3440504
         flavor: b1.large
     variables:
         CUSTOM_REVISION: 'trunk'
@@ -37,7 +37,7 @@ PostProcessing_Linux_Vulkan_Standalone_mono_Linear_trunk:
     name: PostProcessing on Linux_Vulkan_Standalone_mono_Linear on version trunk
     agent:
         type: Unity::VM::GPU
-        image: desktop/ubuntu-22.04-desktop:v2.5184455
+        image: desktop/ubuntu-22.04-desktop:v2.3440504
         flavor: b1.xlarge
     variables:
         CUSTOM_REVISION: 'trunk'
@@ -66,7 +66,7 @@ Build_PostProcessing_Linux_Vulkan_Standalone_mono_Linear_trunk:
     name: Build PostProcessing on Linux_Vulkan_mono_Linear_Standalone_build_Player on version trunk
     agent:
         type: Unity::VM
-        image: desktop/ubuntu-22.04-desktop:v2.5184455
+        image: desktop/ubuntu-22.04-desktop:v2.3440504
         flavor: b1.xlarge
     variables:
         CUSTOM_REVISION: 'trunk'