OvmfPkg: Update ubuntu VM image to 24.04

Update to the latest 24.04 image from 22.04.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml

diff --git a/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml b/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
index 089db6e..a1f3a9b 100644
--- a/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
+++ b/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
@@ -22,7 +22,7 @@
   - job: Platform_CI

     variables:

       package: 'OvmfPkg'

-      vm_image: 'ubuntu-22.04'

+      vm_image: 'ubuntu-24.04'

       should_run: true

       run_flags: "MAKE_STARTUP_NSH=TRUE QEMU_HEADLESS=TRUE"