adjust yarn plugin filter

Signed-off-by: Vincenzo Scamporlino <[email protected]>

Author: vinzscam

.github/workflows/release.yml

@@ -98,6 +98,7 @@ jobs:
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
       - name: Create new diffs
         run: |
+          mkdir diffs
           for version in $(curl -s https://raw.githubusercontent.com/backstage/upgrade-helper-diff/master/releases.json | jq -r 'to_entries | .[] | .value.createApp // .key'); do
             echo "Creating diffs between version $version and $NEW_VERSION"
             git diff -U1 origin/release/$version..origin/release/$NEW_VERSION > diffs/$version..$NEW_VERSION.diff
@@ -115,7 +116,7 @@ jobs:
         run: git checkout -b release-diff/v${RELEASE_VERSION}
       - name: Create new diffs for yarn plugin
         run: |
-          for version in $(curl -s https://raw.githubusercontent.com/backstage/upgrade-helper-diff/master/releases-yarn-plugin.json | jq -r 'to_entries | .[] | .value.createApp // .key'); do
+          for version in $(curl -s https://raw.githubusercontent.com/backstage/upgrade-helper-diff/master/releases-yarn-plugin.json | jq -r 'to_entries |.[] | .key'); do
             echo "Creating yarn-plugin diffs between version $version and $RELEASE_VERSION"
             git diff -U1 origin/release/yarn-plugin/$version..origin/release/yarn-plugin/$RELEASE_VERSION > diffs/$version..$RELEASE_VERSION.diff
           done