Fix manifest generation script

Signed-off-by: Simon Gellis <[email protected]>

Author: SupernaviX

manifest.json

@@ -6,7 +6,7 @@
   },
   "cardanosigner": {
     "image": "ghcr.io/hyperledger/firefly-cardanosigner",
-    "tag": "null",
+    "tag": "v0.6.1",
     "sha": "b950c1d902d58f132f69f5b10aeb1623732de8db4d223534797be87766f123e9"
   },
   "ethconnect": {

manifestgen.sh

@@ -91,7 +91,7 @@ do
 
     # If the tag / build number wasn't set in the label, use whatever docker tag we fetched
     # This is done for backwards compatability, because not all images have labels yet
-    if [ -z "$TAG_LABEL" ]; then
+    if [ -z "$TAG_LABEL" ] || [ "$TAG_LABEL" == "null" ]; then
         TAG_LABEL=$TAG
     fi