fix(hermes): update cache.rs path in dockerignore (#1490)

Our dockerignore ignores all the files containing cache in their name
and hermes had an exception here. This change was missed in moving
Hermes around.

.dockerignore

@@ -15,5 +15,4 @@
 
 .git
 
-hermes/wormhole
-!hermes/src/state/cache.rs
+!apps/hermes/src/state/cache.rs