Allow spaces for Runner Groups and Work Directory

[parroty]

Hello👋 . I noticed that Runner Groups and Work Directory do not work well with spaces. This PR intends to fix them, though it would not be a significant scenario...

Change

• Add quotes to the arguments for ./config.sh call.

Testing

• Tested with Sample Group 1 and dummy dir on GitHub Enterprise Server.

After Change

$ docker build -f redhat-ubi8-actions-runner/Dockerfile -t redhat-ubi8-actions-runner \
  --build-arg "GH_RUNNER_VERSION=2.289.2" \
  --no-cache .

$ docker run -d \
  -e "GITHUB_SERVER=$GITHUB_SERVER" \
  -e "RUNNER_ORGANIZATION_URL=$RUNNER_ORGANIZATION_URL" \
  -e "RUNNER_WORK_DIRECTORY=dummy dir" \
  -e "GITHUB_TOKEN=$GITHUB_TOKEN" \
  redhat-ubi8-actions-runner

0a3594c1d486bf4bc0ae7d0d6b725e4fb5115946c01fdf44690037d1d5274532

$ docker exec -it 0a3594c1d486 ls "dummy dir"
_PipelineMapping  _actions  _temp  _tool  actions-sample

Before Change

$ docker run -d \
  -e "GITHUB_SERVER=$GITHUB_SERVER" \
  -e "RUNNER_ORGANIZATION_URL=$RUNNER_ORGANIZATION_URL" \
  -e "GITHUB_TOKEN=$GITHUB_TOKEN" \
  -e "RUNNER_WORK_DIRECTORY=dummy dir" \
  -e "RUNNER_GROUP=Sample Group 1" \
  redhat-ubi8-actions-runner

e9749f40ed535981fcd1ce2d290539fa0700cf559377c62addd9900a1fdc2439

group name identification failed

$ docker logs e9749f40ed535981fcd1ce2d290539fa0700cf559377c62addd9900a1fdc2439
...
Could not find any self-hosted runner group named "Sample".

name after space was cut off (becomes "dummy" instead of "dummy dir")

$ docker exec -it 574cdead4915 /bin/bash
[actions@574cdead4915 ~]$ ls
_diag  bin  config.sh  dummy  entrypoint.sh  env.sh  externals	run-helper.cmd.template  run-helper.sh.template  run.sh  runsvc.sh  safe_sleep.sh  svc.sh