change the container image to ubuntu:plucky (#1359)

Our fortify workflow is running on ubuntu lunar container that is EOL
since [January 25, 2024(January 25,
2024](https://lists.ubuntu.com/archives/ubuntu-announce/2024-January/000298.html).
This case cause the workflow to fail during update actions like:
```
apt-get update && apt-get install -y make gcc-13
  update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-1[3](https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209#step:5:3) 100
  make all-with-unit-tests CC=gcc OPT=-O3 SERVER_CFLAGS='-Werror -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3'
  shell: sh -e {0}
Ign:1 http://security.ubuntu.com/ubuntu lunar-security InRelease
Err:2 http://security.ubuntu.com/ubuntu lunar-security Release
  [4](https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209#step:5:4)04  Not Found [IP: 91.189.91.82 80]
Ign:3 http://archive.ubuntu.com/ubuntu lunar InRelease
Ign:4 http://archive.ubuntu.com/ubuntu lunar-updates InRelease
Ign:[5](https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209#step:5:5) http://archive.ubuntu.com/ubuntu lunar-backports InRelease
Err:[6](https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209#step:5:7) http://archive.ubuntu.com/ubuntu lunar Release
  404  Not Found [IP: 185.125.190.81 80]
Err:7 http://archive.ubuntu.com/ubuntu lunar-updates Release
  404  Not Found [IP: 185.125.190.81 80]
Err:8 http://archive.ubuntu.com/ubuntu lunar-backports Release
  404  Not Found [IP: 185.125.190.81 80]
Reading package lists...
E: The repository 'http://security.ubuntu.com/ubuntu lunar-security Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu lunar Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu lunar-updates Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu lunar-backports Release' does not have a Release file.
update-alternatives: error: alternative path /usr/bin/gcc-[13](https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209#step:5:14) doesn't exist
Error: Process completed with exit code 2.
```

example:
https://github.com/valkey-io/valkey/actions/runs/12021130026/job/33547460209

This pr uses the latest stable ubuntu image release
[plucky](https://hub.docker.com/layers/library/ubuntu/plucky/images/sha256-dc4565c7636f006c26d54c988faae576465e825ea349fef6fd3af6bf5100e8b6?context=explore)

Signed-off-by: Ran Shidlansik <[email protected]>

.github/workflows/daily.yml

@@ -86,7 +86,7 @@ jobs:
         (github.event_name == 'schedule' && github.repository == 'valkey-io/valkey') ||
         (github.event_name == 'pull_request' && (contains(github.event.pull_request.labels.*.name, 'run-extra-tests') || github.event.pull_request.base.ref != 'unstable'))) &&
       !contains(github.event.inputs.skipjobs, 'fortify')
-    container: ubuntu:lunar
+    container: ubuntu:plucky
     timeout-minutes: 14400
     steps:
       - name: prep