ci: fix broken bleeding edge CI (#4798)

Just on the "bleeding edge" CI job, we were refraining from doing the
apt-get update. It was breaking something last year. Now NOT doing it is
breaking something in this CI test, just since this week (presumably
some default package on the GH runners changed, I haven't been able to
isolate any other reason). But bringing all the apt packages up to date
makes it go away.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

.github/workflows/ci.yml

@@ -452,14 +452,9 @@ jobs:
                             OIIO_CMAKE_FLAGS="-DOIIO_HARDENING=2"
                             EXTRA_DEP_PACKAGES="python3.12-dev python3-numpy"
                             USE_OPENVDB=0
-                            SKIP_APT_GET_UPDATE=1
                             FREETYPE_VERSION=master
                             QT_VERSION=0 INSTALL_OPENCV=0
                             # The installed OpenVDB has a TLS conflict with Python 3.8
-                            # Disabling the `apt-get update` in gh-installdeps.bash 
-                            # addresses a job killing problem in the GHA Ubuntu
-                            # 24.04 runners that cropped up circa May 29 2024. Maybe
-                            # it will be fixed and we can do the update again later?
           - desc: all local builds gcc12 C++17 avx2 exr3.2 ocio2.3
             nametag: linux-local-builds
             runner: ubuntu-22.04