[DOCS] remove extraneous ` from cache page

docs/reference/index-modules/cache.asciidoc

@@ -19,7 +19,7 @@ recommended to use in almost all cases) is the `node` filter cache type.
 The `node` filter cache may be configured to use either a percentage of
 the total memory allocated to the process or an specific amount of
 memory. All shards present on a node share a single node cache (thats
-why its called `node``). The cache implements an LRU eviction policy:
+why its called `node`). The cache implements an LRU eviction policy:
 when a cache becomes full, the least recently used data is evicted to
 make way for new data.
 
@@ -53,4 +53,3 @@ which is usually fine with `soft` cache and proper cacheable filters.
 after a certain time of inactivity. Defaults to `-1`. For example, can
 be set to `5m` for a 5 minute expiry.
 |=======================================================================
-