[PATCH] CI: Fix package installation for Coverity run

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Something has changed recently in the Github Actions environment and the
golang metapacakge resolves to something that no longer exists:

  https://github.com/xen-project/xen/actions/runs/11539340171/job/32120834909

Update metadata before installing, which fixes things.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Michal Orzel <michal.orzel@xxxxxxx>
CC: Doug Goldstein <cardoe@xxxxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Example dry run with this fix:

  https://github.com/andyhhp/xen/actions/runs/11692180675/job/32560954258
---
 .github/workflows/coverity.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 984636eb4635..a6c2819b0a24 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -12,6 +12,7 @@ jobs:
     steps:
     - name: Install build dependencies
       run: |
+        sudo apt-get update
         sudo apt-get install -y \
           build-essential \
           git-core \
-- 
2.39.5