fix: typo in gc docs (#1458)

Author: sunwupark

content/develop/interact/search-and-query/administration/gc.md

@@ -28,7 +28,7 @@ You want to optimize the index, but you also don't want to disturb normal operat
 
 ## Garbage collecting a single-term index
 
-A single-term inverted index is an array of blocks, each of which containin an encoded list of records; e.g., a document id delta plus other data depending on the index encoding scheme. When some of these records refer to deleted documents this is called garbage. 
+A single-term inverted index is an array of blocks, each of which contains an encoded list of records; e.g., a document id delta plus other data depending on the index encoding scheme. When some of these records refer to deleted documents this is called garbage. 
 
 The algorithm is simple: