minor fix

Author: NikolayS

0011_ad_hoc_monitoring.md

@@ -4,7 +4,7 @@ Originally from: [tweet](https://twitter.com/samokhvalov/status/1710176204953919
 
 # Ad-hoc monitoring
 
-<img src="files/00011_cover.png" width="600" />
+<img src="files/0011_cover.png" width="600" />
 
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