Update assets url in setting-up-prebid-video-in-dfp.md (prebid#6186)

* Update assets url in setting-up-prebid-video-in-dfp.md

* Apply suggestion from @muuki88

Author: muuki88

adops/setting-up-prebid-video-in-dfp.md

@@ -86,7 +86,7 @@ In these examples, the `uuid` is set to the value of the `hb_pb_cat_dur` key you
 
 The resulting creative should look something like the following:
 
-![GAM Video Creative Setup](assets/images/ad-ops/gam-sbs/gam-tag-setup.png)!
+![GAM Video Creative Setup](/assets/images/ad-ops/gam-sbs/gam-tag-setup.png)!
 
 {:start="7"}
 7. If you're using jsdelivr, set your **Associated ad technology provider**: