ci: add the -usecache test to macos

.github/workflows/ci.yml

@@ -93,8 +93,6 @@ jobs:
 #        ./v -silent test-compiler
     - name: v self compilation
       run: ./v -o v2 cmd/v && ./v2 -o v3 cmd/v && ./v3 -o v4 cmd/v
-    - name: v self with -usecache
-      run: ./v -o v2 -usecache cmd/v
     - name: Fixed tests
       run: ./v -silent test-fixed
     - name: Test building v tools
@@ -150,6 +148,8 @@ jobs:
       run:  make -j4 && ./v -cg -cflags -Werror -o v cmd/v
     - name: Build V using V
       run:  ./v -o v2 cmd/v && ./v2 -o v3 cmd/v
+    - name: v self with -usecache
+      run: ./v -o v2 -usecache cmd/v
     - name: Test symlink
       run:  ./v symlink
 #    - name: Set up pg database