Fix the check for appspec.yml detection for tar archives(#77)

Co-authored-by: Vikas Peri <vikas.peri@wanews.com.au>
Co-authored-by: Connor Tumbleson <iBotPeaches@users.noreply.github.com>

Author: 3 people

deploy.sh

@@ -194,7 +194,7 @@ if [ "$BUNDLE_TYPE" == 'zip' ]; then
         exit 1;
     fi
 else
-    if tar -tf "$ZIP_FILENAME" | grep -qv appspec.yml; then
+    if ! tar -tf "$ZIP_FILENAME" | grep -q appspec.yml; then
         echo "::error::$ZIP_FILENAME was not generated properly (missing appspec.yml)."
         exit 1;
     fi