[any.class.general] Replace "instance" with "object"

Author: frederick-vs-ja

source/utilities.tex

@@ -7137,9 +7137,9 @@
 \end{codeblock}
 
 \pnum
-An object of class \tcode{any} stores an instance of any type that meets the constructor requirements or it has no value,
+An object of class \tcode{any} stores an object of any type that meets the constructor requirements or it has no value,
 and this is referred to as the \defn{state} of the class \tcode{any} object.
-The stored instance is called the \defnx{contained value}{contained value!\idxcode{any}}.
+The stored object is called the \defnx{contained value}{contained value!\idxcode{any}}.
 Two states are equivalent if either they both have no value, or they both have a value and the contained values are equivalent.
 
 \pnum