TT#151550 github workflow: be a bit more verbose about apt-get actions

Using apt-get with `-qq` displays only the following message
on package installation problems:

| E: Unable to correct problems, you have held broken packages.

Whereas with `-q`, we get the actual underlying problem, being:

| The following packages have unmet dependencies:
|  builddeps:. : Depends: debhelper-compat (= 13)
| E: Unable to correct problems, you have held broken packages.

Change-Id: Ibadc483f1cb324c83d7616d009bcc932876a25a3

.github/workflows/coverity.yml

@@ -28,8 +28,8 @@ jobs:
 
       - name: Get build dependencies
         run: |
-          sudo apt-get install -qq -y --no-install-recommends git ca-certificates curl
-          sudo apt-get build-dep -qq -y .
+          sudo apt-get install -q -y --no-install-recommends git ca-certificates curl
+          sudo apt-get build-dep -q -y .
 
       - name: Get coverity scan
         run: |