cmake: fix silly typo in zlib mirror url

Follow-up to 4a8c395 #191

Author: vszakats

CMakeLists.txt

@@ -14,7 +14,7 @@ include(ExternalProject)
 # renovate: datasource=github-tags depName=madler/zlib
 set(ZLIB_VERSION 1.3.1)
 set(ZLIB_URL https://zlib.net/zlib-${ZLIB_VERSION}.tar.xz
-             https://github.com/madler/zlib/releases/download/v{ver}/zlib-${ZLIB_VERSION}.tar.xz)
+             https://github.com/madler/zlib/releases/download/v${ZLIB_VERSION}/zlib-${ZLIB_VERSION}.tar.xz)
 set(ZLIB_INSTALL_DIR ${CMAKE_BINARY_DIR}/zlib-install)
 set(ZLIB_STATIC_LIB ${ZLIB_INSTALL_DIR}/lib/libz.a)