[3.14] gh-135155: Added dependencies required for compiling the _zstd module (GH-135156) (#135197)

gh-135155: Added dependencies required for compiling the _zstd module (GH-135156)
(cherry picked from commit a7d41e8)

Co-authored-by: Weipeng Hong <[email protected]>

Author: miss-islington

.github/workflows/posix-deps-apt.sh

@@ -17,6 +17,7 @@ apt-get -yq install \
     libreadline6-dev \
     libsqlite3-dev \
     libssl-dev \
+    libzstd-dev \
     lzma \
     lzma-dev \
     strace \