keep the sampling-statements tag + add distribution-stataments tag

Author: avehtari

src/reference-manual/statements.qmd

@@ -366,8 +366,12 @@ their sum will be added to the total log density.
 To access accumulated log density up to the current execution point,
 the function `target()` may be used.
 
+## Sampling statements {#sampling-statements.section}
 
-## Distribution statements {#sampling-statements.section}
+The term "sampling statement" has been replaced with 
+[#distribution-statements.section](distribution statement).
+
+## Distribution statements {#distribution-statements.section}
 
 Stan supports writing probability statements also using distribution
 statements, for example