Auto-update Docker and act in run_workflows_locally.sh

[Copilot]

install_docker() and install_act() short-circuited on first presence check, never updating already-installed tools.

Changes

• install_docker(): when Docker is present, attempt an in-place upgrade before returning

  • apt-get install --only-upgrade on Debian/Ubuntu
  • yum update on RHEL/Fedora/CentOS
  • Warns (does not fail) on unsupported platforms

• install_act(): when act is present, compare installed version against latest GitHub release; re-run upstream install.sh only when behind

  • Gracefully skips check when either version is unresolvable
  • Strips v-prefix consistently via grep -oE '[0-9]+\.[0-9]+\.[0-9]+'

# Before
if command_exists act; then
    info "act is already installed: $(act --version)"
    return 0
fi

# After
current_version="$(act --version 2>/dev/null | grep -oE '[0-9]+\.[0-9]+\.[0-9]+' | head -1 || true)"
latest_version="$(curl -fsSL https://api.github.com/repos/nektos/act/releases/latest 2>/dev/null \
    | grep '"tag_name"' | grep -oE '[0-9]+\.[0-9]+\.[0-9]+' | head -1 || true)"

if [[ "$current_version" == "$latest_version" ]]; then
    info "act is already up to date: $(act --version)"
    return 0
fi

header "Updating act from ${current_version} to ${latest_version}…"
curl -fsSL https://raw.githubusercontent.com/nektos/act/master/install.sh \
    | sudo bash -s -- -b /usr/local/bin

Mirrors the approach from gensyn/ssh_docker#50.

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