Fastly code samples update (#1889)

Author: MagdalenaZuba

docs/updating/from_1.x_2.x/update_db_to_2.5.md

@@ -886,7 +886,7 @@ You do this manually by following this procedure:
 
 ###### VCL configuration for Fastly
 
-[[% include 'snippets/update/vcl_configuration_for_fastly.md_v3' %]]
+[[% include 'snippets/update/vcl_configuration_for_fastly_v3.md' %]]
 
 ##### Optimize workflow queries
 

docs/updating/from_2.5/to_3.3.latest.md

@@ -43,7 +43,7 @@ You do this manually by following this procedure:
 
 #### VCL configuration for Fastly
 
-[[% include 'snippets/update/vcl_configuration_for_fastly.md_v3' %]]
+[[% include 'snippets/update/vcl_configuration_for_fastly_v3.md' %]]
 
 #### Optimize workflow queries
 

docs/updating/from_3.3/update_from_3.3.md

@@ -109,7 +109,7 @@ You do this manually by following this procedure:
 
 #### VCL configuration for Fastly
 
-[[% include 'snippets/update/vcl_configuration_for_fastly.md_v3' %]]
+[[% include 'snippets/update/vcl_configuration_for_fastly_v3.md' %]]
 
 #### Optimize workflow queries