Update release.yml

Update working directory of crates.io publishing

Author: dbaileychess

.github/workflows/release.yml

@@ -134,7 +134,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: ./rust
+        working-directory: ./rust/flatbuffers
     steps:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1