ColBERT FastEmbed docs revamp + a couple of fixes

qdrant-landing/content/documentation/concepts/collections.md

@@ -633,7 +633,7 @@ And additionally, sparse vectors and dense vectors must have different names wit
 PUT /collections/{collection_name}
 {
     "sparse_vectors": {
-        "text": { },
+        "text": { }
     }
 }
 ```
@@ -656,6 +656,7 @@ client = QdrantClient(url="http://localhost:6333")
 
 client.create_collection(
     collection_name="{collection_name}",
+    vectors_config={},
     sparse_vectors_config={
         "text": models.SparseVectorParams(),
     },

qdrant-landing/content/documentation/concepts/vectors.md

@@ -534,7 +534,7 @@ client.create_collection(
     collection_name="{collection_name}",
     vectors_config=models.VectorParams(
         size=128,
-        distance=models.Distance.Cosine,
+        distance=models.Distance.COSINE,
         multivector_config=models.MultiVectorConfig(
             comparator=models.MultiVectorComparator.MAX_SIM
         ),