ci: fix fromJSON input

Signed-off-by: Michael Beemer <[email protected]>

Author: beeme1mr

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
     if: ${{ fromJSON(needs.release-please.outputs.release_created || false) }}
     strategy:
       matrix:
-        path: ${{ fromJSON(needs.release-please.outputs.paths_released || []) }}
+        path: ${{ fromJSON(needs.release-please.outputs.paths_released || "[]") }}
     environment: release
     permissions:
       # IMPORTANT: this permission is mandatory for trusted publishing to pypi