feat: Add log_level input to Jekyll build workflow

Adds a new `log_level` input parameter to the Jekyll build workflow. This
allows the user to specify the desired log level for the Jekyll build
process, which can be useful for debugging purposes.

.github/workflows/jekyll-feed-to-vespa.yml

@@ -3,6 +3,12 @@ name: Feed Jekyll posts to Vespa
 
 on:
   workflow_call:
+    inputs:
+      log_level:
+        description: 'Log level for Jekyll build.'
+        required: false
+        default: 'info'
+        type: string
 
 defaults:
   run:
@@ -19,6 +25,8 @@ jobs:
 
       - name: Build with Jekyll
         uses: vespa-engine/gh-actions/jekyll-build-json@feature-jekyll-build-json-action
+        with:
+          log_level: ${{ github.event.inputs.log_level }}
 
       - name: List JSON
         run: |