fix: repair formatting of code snippet in metamorph.md (#1833)

Co-authored-by: Martin Adámek <[email protected]>

Author: bliuchak

sources/platform/actors/development/programming_interface/metamorph.md

@@ -33,7 +33,7 @@ These benefits make metamorph a valuable tool for creating complex, efficient wo
 
 ## Implementation guidelines
 
-To make your Actor compatible with metamorph, use `Actor.getInput()` instead of `Actor.getValue(`INPUT`)`. This method fetches the input using the correct key (_INPUT-METAMORPH-1_) for metamorphed runs, ensuring proper data retrieval in transformed Actor runs.
+To make your Actor compatible with metamorph, use `Actor.getInput()` instead of `Actor.getValue('INPUT')`. This method fetches the input using the correct key (_INPUT-METAMORPH-1_) for metamorphed runs, ensuring proper data retrieval in transformed Actor runs.
 
 :::note Runtime limits