Fix missing keyword arg key in PipelineLocks

src/api/src/backend/views/PipelineLocks.py

@@ -55,7 +55,7 @@ def post(self, request, group_id, pipeline_id):
 
             # Get the pipeline run
             pipeline_run = PipelineRun.objects.filter(
-                body.pipeline_run_uuid
+                uuid=body.pipeline_run_uuid
             ).first()
 
             # Return BadRequest if no pipeline found