add workflow dispatch to offliner-definition ci

Author: elfkuzco

.github/workflows/update-zim-offliner-definition.yaml

@@ -8,11 +8,18 @@ on:
   release:
     types: [published]
 
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version to publish"
+        required: false
+        default: "dev"
+
 jobs:
   prepare-json:
     runs-on: ubuntu-24.04
     outputs:
-      offliner_definition: ${{ steps.read-json.outputs.offliner_definition }}
+      offliner_definition_b64: ${{ steps.read-json.outputs.offliner_definition_b64 }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -25,14 +32,14 @@ jobs:
             echo "File not found!" >&2
             exit 1
           fi
-          json=$(jq -c . offliner-definition.json)
-          echo "offliner_definition=$json" >> $GITHUB_OUTPUT
+          json_b64=$(base64 -w0 <<< "$(jq -c . offliner-definition.json)")
+          echo "offliner_definition_b64=$json_b64" >> $GITHUB_OUTPUT
   call-workflow:
     needs: prepare-json
     uses: openzim/overview/.github/workflows/update-zimfarm-offliner-definition.yaml@main
     with:
-      version: ${{ github.event_name == 'release' && github.event.release.tag_name || 'dev' }}
+      version: ${{ github.event_name == 'release' && github.event.release.tag_name || (github.event.inputs.version || 'dev') }}
       offliner: openedx
-      offliner_definition: ${{ needs.prepare-json.outputs.offliner_definition }}
+      offliner_definition_b64: ${{ needs.prepare-json.outputs.offliner_definition_b64 }}
     secrets:
       zimfarm_ci_secret: ${{ secrets.ZIMFARM_CI_SECRET }}