Update README.md (bregman-arie#10589)

Author: odd509

README.md

@@ -1119,7 +1119,7 @@ With <code>var x int = 2</code> we are setting the variable type to integer whil
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 <summary>True or False? In Go we can redeclare variables and once declared we must use it.</summary>
 
-False. We can't redeclare variables but yes, we must used declared variables.
+False. We can't redeclare variables but yes, we must use declared variables.
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