add caches

ci/build-linux.yml

@@ -4,6 +4,9 @@ image_resource:
   type: registry-image
   source: {repository: rust}
 
+caches:
+- path: "./target/"
+
 inputs:
 - name: repo
 

ci/lint.yml

@@ -7,6 +7,7 @@ image_resource:
 # This should cache clippy
 caches:
 - path: "./.rustup/"
+- path: "./target/"
 
 inputs:
 - name: repo

ci/test.yml

@@ -4,6 +4,9 @@ image_resource:
   type: registry-image
   source: {repository: rust}
 
+caches:
+- path: "./target/"
+
 inputs:
 - name: repo