update intro and code comments

Author: stephmarie17

source/crud/update.txt

@@ -265,7 +265,7 @@ exisiting documents in the ``restaurants`` collection. Select the
    .. tab:: Struct
       :tabid: structExample
 
-      The following code uses a struct to define the filter and update multiple document in the ``restuarants`` collection:
+      The following code uses a struct to define the filter and update multiple documents in the ``restuarants`` collection:
 
       .. io-code-block::
          :copyable: true
@@ -283,7 +283,7 @@ exisiting documents in the ``restaurants`` collection. Select the
    .. tab:: bson.D
       :tabid: bsonDExample
 
-      The following code uses a ``bson.D`` type to define the filter and update multiple document in the ``restuarants`` collection:
+      The following code uses a ``bson.D`` type to define the filter and update multiple documents in the ``restuarants`` collection:
 
       .. io-code-block::
          :copyable: true

source/includes/usage-examples/code-snippets/updateMany.go

@@ -21,7 +21,7 @@ type Restaurant struct {
 	AverageRating float64       `bson:"avg_rating,omitempty"`
 }
 
-// Create a filter struct to specify the document to update
+// Create a filter struct to specify the documents to update
 type UpdateManyRestaurantFilter struct {
 	Cuisine string `bson:"cuisine"`
 	Borough string `bson:"borough"`