Disambiguate object path in document to accomodate for new SAM object

refs idaholab#29543

framework/doc/content/syntax/Postprocessors/index.md

@@ -140,22 +140,22 @@ these two methods: the `_u[_qp]` is the value of the variable at the current nod
 from a shared base class and  `_sum` and `_n` are a member variables defined within class for
 performing the calculation.
 
-!listing AverageNodalVariableValue.C start=doco-execute-get-start end=doco-execute-get-end include-start=false
+!listing postprocessors/AverageNodalVariableValue.C start=doco-execute-get-start end=doco-execute-get-end include-start=false
 
 In parallel, the calls to the execute method occur on each process or thread on a subset of the
 domain, in this case nodes. Therefore, the computed values must be combined to get the actual
 summations required to compute the average value. The first step is to setup the state
 of this calculation within the initialize method, which in this example sets the
 `_sum` and `_n` member variables to zero.
 
-!listing AverageNodalVariableValue.C start=doco-init-start end=doco-init-end include-start=false
+!listing postprocessors/AverageNodalVariableValue.C start=doco-init-start end=doco-init-end include-start=false
 
 After the aforementioned execute method is called for each node the computed values for `_sum` and
 `_n` must be aggregated from across processes to the root processes. For this problem a gather
 operation is required to collect the values computed on all processes to the root process. This is
 accomplished via the `gatherSum` method.
 
-!listing AverageNodalVariableValue.C start=doco-final-start end=doco-final-end include-start=false
+!listing postprocessors/AverageNodalVariableValue.C start=doco-final-start end=doco-final-end include-start=false
 
 Of course, the type of communication necessary depends on the calculation being performed. The
 [UserObject.md] base class includes helper methods for common parallel communications functions.
@@ -169,7 +169,7 @@ threads to the object on the root thread. For the AverageNodalVariableValue post
 values for `_sum` and `_n` on the root process object are updated to include the these same values
 from the other threads.
 
-!listing AverageNodalVariableValue.C start=doco-thread-start end=doco-thread-end include-start=false
+!listing postprocessors/AverageNodalVariableValue.C start=doco-thread-start end=doco-thread-end include-start=false
 
 ## Execute On... id=execute-on