workflows/test: add zstd to Mac OS dependencies

Not sure when this became a requirement, but it needs to added to
LIBRARY_PATH.

Signed-off-by: Charalampos Mitrodimas <charmitro@posteo.net>

.github/workflows/test.yaml

@@ -556,9 +556,11 @@ jobs:
          # echo "RUSTFLAGS=-L/usr/lib64 -L/usr/lib" >> $GITHUB_ENV
       - name: Set up dependencies for Mac OS
         run: |
-          brew install automake
+          brew install automake zstd
           # using gnu-tar is a workaround for https://github.com/actions/cache/issues/403
           brew install gnu-tar
+          # Set up library paths for zstd
+          echo "LIBRARY_PATH=/opt/homebrew/lib:/usr/local/lib:$LIBRARY_PATH" >> $GITHUB_ENV
           echo PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH" >> $GITHUB_ENV
         if: matrix.metadata.os == 'macos-13'
       - name: Install Rust
@@ -811,9 +813,11 @@ jobs:
 
       - name: Set up dependencies for Mac OS
         run: |
-          brew install automake
+          brew install automake zstd
           # using gnu-tar is a workaround for https://github.com/actions/cache/issues/403
           brew install gnu-tar
+          # Set up library paths for zstd
+          echo "LIBRARY_PATH=/opt/homebrew/lib:/usr/local/lib:$LIBRARY_PATH" >> $GITHUB_ENV
           echo PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH" >> $GITHUB_ENV
         if: matrix.metadata.os == 'macos-13'
       - name: Install Rust