do not quote token here

Adding quotes here, when the variable is empty you get:

curl https://api.github.com/repos/fluxcd/flux2/releases/latest -sL ''

(ref:
https://github.com/kingdonb/bootstrap-repo/actions/runs/3991169408/jobs/6845685491#step:3:31
)

That does curl twice, once for the URL provided and again for the empty
string, which results in curl returning error code 3 "malformed URL"

Signed-off-by: Kingdon Barrett <kingdon@weave.works>

action/action.yml

@@ -33,7 +33,7 @@ runs:
         fi
 
         if [ -z "${VERSION}" ]; then
-          VERSION=$(curl https://api.github.com/repos/fluxcd/flux2/releases/latest -sL "${TOKEN[@]}" | grep tag_name | sed -E 's/.*"([^"]+)".*/\1/' | cut -c 2-)
+          VERSION=$(curl https://api.github.com/repos/fluxcd/flux2/releases/latest -sL ${TOKEN[@]} | grep tag_name | sed -E 's/.*"([^"]+)".*/\1/' | cut -c 2-)
         fi
 
         BIN_URL="https://github.com/fluxcd/flux2/releases/download/v${VERSION}/flux_${VERSION}_linux_${ARCH}.tar.gz"