Fix Ubuntu tests often failing first time. HOPEFULLY

Signed-off-by: itowlson <ivan.towlson@fermyon.com>

Author: itowlson

.github/workflows/build.yml

@@ -153,6 +153,7 @@ jobs:
         with:
           rust: true
           rust-wasm: true
+          rust-cache: true
           nomad: true
 
       - name: Check disk space (Before)