fix(healthcare): correct typo 'occured' to 'occurred' in importDicomInstance (#4291)

Minor spelling fix in the console.log string emitted when a DICOM import
operation returns a sample error. User-facing output only; no behavior
change.

Co-authored-by: Jennifer Davis <sigje@google.com>

Author: mohammadmseet-hue

healthcare/dicom/importDicomInstance.js

@@ -73,7 +73,7 @@ const main = (
     } else {
       console.log('Encountered errors. Sample error:');
       console.log(
-        'Resource on which error occured:',
+        'Resource on which error occurred:',
         data.error.details[0]['sampleErrors'][0]['resource']
       );
       console.log(