Update sl-snowflake-qs.md (#5947)

the entity name for the Orders model does not allign with the entity
name from the Customers model. The metric Large Order does not use the
correct syntax and thus cannot be used by the BI tool downstream

## What are you changing in this pull request and why?
Modifying code snippets for `fct_orders.yml` to ensure that the
customers entity is aligned with `dim_customers`
Fixing code snippet for the filters param of Large Orders.

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Co-authored-by: Mirna Wong <[email protected]>
Co-authored-by: Matt Shaver <[email protected]>

website/docs/guides/sl-snowflake-qs.md

@@ -661,7 +661,8 @@ semantic_models:
     entities: 
       - name: order_id
         type: primary
-      - name: customer_id
+      - name: customer
+        expr: customer_id
         type: foreign
 ```
 
@@ -686,8 +687,9 @@ semantic_models:
     entities:
       - name: order_id
         type: primary
-      - name: customer_id
-        type: foreign  
+      - name: customer
+        expr: customer_id
+        type: foreign
     # Newly added
     dimensions:   
       - name: order_date
@@ -717,7 +719,8 @@ semantic_models:
     entities:
       - name: order_id
         type: primary
-      - name: customer_id
+      - name: customer
+        expr: customer_id
         type: foreign
     dimensions:
       - name: order_date
@@ -777,7 +780,8 @@ semantic_models:
     entities:
       - name: order_id
         type: primary
-      - name: customer_id
+      - name: customer
+        expr: customer_id
         type: foreign
     dimensions:
       - name: order_date
@@ -825,7 +829,7 @@ metrics:
     type_params:
       measure: order_count
     filter: |
-      {{ Dimension('order_id__order_total_dim') }} >= 20
+      {{ Metric('order_total', group_by=['order_id']) }} >=  20
   # Ratio type metric
   - name: "avg_order_value"
     label: "avg_order_value"