Failed to create user namespace: user namespace requires to set /proc/sys/kernel/unprivileged_userns_clone to 1

Hello! Thank for making this action! I am close to getting it working for my project, but am running into the following error message. The `setup-singularity` action step completes fine, but when subsequent steps attempt to run singularity containers I get the following error:

```
Activating singularity image /github/workspace/.singularity/be463e8ff7ab6a778774f91d2bfa1a1d.simg
INFO: Converting SIF file to temporary sandbox...
FATAL: while extracting /github/workspace/.singularity/be463e8ff7ab6a778774f91d2bfa1a1d.simg: root filesystem extraction failed: extract command failed: ERROR : Failed to create user namespace: user namespace requires to set /proc/sys/kernel/unprivileged_userns_clone to 1
```

Googling has been unproductive so far. I tried adding `--fakeroot` to the singularity command to no avail. I am trying to have the action run through a snakemake pipeline where each task is executed with a container, so I don't have the exact invovation unfortunately. The test invocation `singularity run docker://alpine cat /etc/os-release ` runs fine without error.

Its a long shot, but have you come across something like this before?