Added zlib dependency for Windows build

Author: Klubuntu

.github/workflows/build.yml

@@ -347,6 +347,7 @@ jobs:
           # Release-only triplets (avoid building debug variants)
           & $vcpkgExe install `
             ffmpeg:x64-windows-release `
+            zlib:x64-windows-release `
             mbedtls:x64-windows-release `
             speexdsp:x64-windows-release `
             jansson:x64-windows-release `