ci: set manifest path

.github/workflows/bootpkg.yaml

@@ -18,6 +18,5 @@ jobs:
           override: true
       - uses: https://github.com/actions-rs/cargo@v1
         with:
-          cwd: bootpkg
-          command: build
-          args: --verbose --all
+          command: check
+          args: --manifest-path bootpkg/Cargo.toml --verbose --all

.github/workflows/pkgr.yaml

@@ -18,6 +18,5 @@ jobs:
           override: true
       - uses: https://github.com/actions-rs/cargo@v1
         with:
-          cwd: pkgr
-          command: build
-          args: --verbose --all
+          command: check
+          args: --manifest-path pkgr/Cargo.toml --verbose --all