Fixed script exiting automatically

.github/workflows/publish.yml

@@ -76,11 +76,13 @@ jobs:
       name: Test Docker Image
       run: |
         docker run --rm --entrypoint chifra ${{ env.TEST_TAG }} --version 2> /tmp/version
-        grep `echo ${{ inputs.tag }} | sed 's/v//'` /tmp/version
-	if [ $? != 0 ]; then 
-	echo "VERSION MISMATCH"
-	cat /tmp/version
-	exit 1
+        if [ -z $(grep `echo ${{ inputs.tag }} | sed 's/v//'` /tmp/version) ]
+	then
+		echo "VERSION MISMATCH"
+		cat /tmp/version
+		exit 1
+	else
+		echo "PASS"
 	fi
 
     # Now we know it's working, so we will commit the changed VERSION file and create new tag