minor update and fix for cache_httpfs extension

Author: dentiny

extensions/cached_read_httpfs/description.yml renamed to extensions/cache_httpfs/description.yml

@@ -1,6 +1,6 @@
 extension:
   name: cache_httpfs
-  description: Read cached filesystem for httfs
+  description: Read cached filesystem for httpfs
   version: 0.0.1
   language: C++
   build: cmake