Regenerate snippet .md files

Run `./generate-md.py` to update generated markdown files after
semi-manual changes made in the previous commit.
This commit serves as a gist of fixed issues found in snippets.

(it's easier to review 250 lines diff rather than 31k lines diff, isn't it?)

qdrant-landing/content/documentation/headless/snippets/insert-points/with-payload/generated/csharp.md

@@ -27,10 +27,7 @@ await client.UpsertAsync(
             Payload =
             {
                 ["city"] = new[] { "Berlin", "Moscow" },
-                ["price"] = new Value
-                {
-                    ListValue = new ListValue { Values = { new Value[] { 1.99, 2.99 } } }
-                }
+                ["price"] = new Value[] { 1.99, 2.99 }
             }
         }
     }

qdrant-landing/content/documentation/headless/snippets/insert-points/with-payload/generated/java.md

@@ -1,5 +1,6 @@
 ```java
 import static io.qdrant.client.PointIdFactory.id;
+import static io.qdrant.client.ValueFactory.list;
 import static io.qdrant.client.ValueFactory.value;
 import static io.qdrant.client.VectorsFactory.vectors;
 

qdrant-landing/content/documentation/headless/snippets/insert-points/with-payload/generated/rust.md

@@ -1,6 +1,6 @@
 ```rust
 use qdrant_client::qdrant::{PointStruct, UpsertPointsBuilder};
-use qdrant_client::{Payload, Qdrant, QdrantError};
+use qdrant_client::{Payload, Qdrant};
 use serde_json::json;
 
 let client = Qdrant::from_url("http://localhost:6334").build()?;