Uncomment RUSTFLAGS/RUSTDOCFLAGS variable settings in ci-basic.yml as it turned out they are still required despite the adding zcash_unstable to .cargo/config.toml

Author: dmidem

.github/workflows/ci-basic.yml

@@ -16,10 +16,9 @@ jobs:
       ROCKSDB_LIB_DIR: /usr/lib
       # Use system-installed Snappy library for compression in RocksDB
       SNAPPY_LIB_DIR: /usr/lib/x86_64-linux-gnu
-      # FIXME: remove the following commented lines
       # Enable the `nu6` feature in `zcash_protocol`
-      #RUSTFLAGS: '--cfg zcash_unstable="nu6"'
-      #RUSTDOCFLAGS: '--cfg zcash_unstable="nu6"'
+      RUSTFLAGS: '--cfg zcash_unstable="nu6"'
+      RUSTDOCFLAGS: '--cfg zcash_unstable="nu6"'
 
     steps:
       - uses: actions/checkout@v4