Added references to broadcasting rules

Author: dvd101x

src/function/matrix/broadcastMatrices.js

@@ -8,6 +8,7 @@ const dependencies = ['typed']
 export const createBroadcastMatrices = /* #__PURE__ */ factory(name, dependencies, ({ typed }) => {
   /**
    * Broadcast any number of arrays or matrices against each other.
+   * The broadcasting rules can be found in [Matrices#Broadcasting](./datatype/matrices#Broadcasting).
    *
    * Syntax:
    *

src/function/matrix/broadcastSizes.js

@@ -8,7 +8,7 @@ export const createBroadcastSizes = /* #__PURE__ */ factory(name, dependencies,
   /**
    * Calculate the broadcasted size of one or more matrices or arrays.
    * Always returns an Array containing numbers.
-   *
+   * The broadcasting rules can be found in [Matrices#Broadcasting](./datatype/matrices#Broadcasting).*
    * Syntax:
    *
    *     math.broadcastSizes(x, y)

src/function/matrix/broadcastTo.js

@@ -7,7 +7,8 @@ const dependencies = ['typed']
 export const createBroadcastTo = /* #__PURE__ */ factory(name, dependencies, ({ typed }) => {
   /**
      * Broadcast an array to a specified size.
-     *
+     * The broadcasting rules can be found in [Matrices#Broadcasting](./datatype/matrices#Broadcasting).   
+  *
      * Syntax:
      *
      *     math.broadcastTo(x, size)