Updated at_cache (markdown)

at_cache.md

@@ -1 +1,13 @@
-# @cache
+# @cache
+The @cache decorator can be import with.
+´´´python
+from functools import cache
+
+@cache
+def some_loop_function():
+  mod25 = []
+  for i in range(1000):
+    if i%25:
+      mod25.append(i)
+  return mod25
+´´´