Update .github/actions/package-nfpm/action.yml

Co-authored-by: Stéphane Chapron <34628915+sc979@users.noreply.github.com>

.github/actions/package-nfpm/action.yml

@@ -85,7 +85,7 @@ runs:
           export DIST=""
           if [ "${{ inputs.stability }}" == "unstable" ] || [ "${{ inputs.stability }}" == "canary" ]; then
             export RELEASE="$RELEASE~${{ inputs.distrib }}"
-          elif [ "${{ inputs.stability }}" = "testing" ]; then
+          elif [ "${{ inputs.stability }}" == "testing" ]; then
             export RELEASE="1~${{ inputs.distrib }}"
           fi
           export APACHE_USER="www-data"