Update product-os/flowzone digest to 20a58d6

Update product-os/flowzone

Change-type: patch

Author: balena-renovate[bot]

.github/workflows/flowzone.yml

@@ -15,5 +15,5 @@ permissions:
 jobs:
   flowzone:
     name: Flowzone
-    uses: product-os/flowzone/.github/workflows/flowzone.yml@7b1359dc5b9ca4e6621b6ea7427128569d3f68d8 # master
+    uses: product-os/flowzone/.github/workflows/flowzone.yml@20a58d6ef9ae3e71a8b159c6bb41d29e8b59df0f # master
     secrets: inherit