perlop: Move isa() section to proper place

This document is supposed to be in decreasing operator precedence order.
isa() is higher than the relational operators, so move it to there.

Author: khwilliamson

pod/perlop.pod

@@ -537,6 +537,25 @@ X<-X> X<filetest> X<operator, filetest>
 
 See also L</"Terms and List Operators (Leftward)">.
 
+=head2 Class Instance Operator
+X<isa operator>
+
+Binary C<isa> evaluates to true when the left argument is an object instance of
+the class (or a subclass derived from that class) given by the right argument.
+If the left argument is not defined, not a blessed object instance, nor does
+not derive from the class given by the right argument, the operator evaluates
+as false. The right argument may give the class either as a bareword or a
+scalar expression that yields a string class name:
+
+    if( $obj isa Some::Class ) { ... }
+
+    if( $obj isa "Different::Class" ) { ... }
+    if( $obj isa $name_of_class ) { ... }
+
+This feature is available from Perl 5.31.6 onwards when enabled by
+C<use feature 'isa'>. This feature is enabled automatically by a
+C<use v5.36> (or higher) declaration in the current scope.
+
 =head2 Relational Operators
 X<relational operator> X<operator, relational>
 
@@ -661,25 +680,6 @@ function, available in Perl v5.16 or later:
 
     if ( fc($x) eq fc($y) ) { ... }
 
-=head2 Class Instance Operator
-X<isa operator>
-
-Binary C<isa> evaluates to true when the left argument is an object instance of
-the class (or a subclass derived from that class) given by the right argument.
-If the left argument is not defined, not a blessed object instance, nor does
-not derive from the class given by the right argument, the operator evaluates
-as false. The right argument may give the class either as a bareword or a
-scalar expression that yields a string class name:
-
-    if( $obj isa Some::Class ) { ... }
-
-    if( $obj isa "Different::Class" ) { ... }
-    if( $obj isa $name_of_class ) { ... }
-
-This feature is available from Perl 5.31.6 onwards when enabled by
-C<use feature 'isa'>. This feature is enabled automatically by a
-C<use v5.36> (or higher) declaration in the current scope.
-
 =head2 Smartmatch Operator
 
 The C<smartmatch> feature is discouraged for new code and retained for