Bump zlib to 1.2.13.

Due to security issue, zlib 1.2.12 is yanked, just like 1.2.11 was before. So builds not using TF mirror will break.

See https://www.zlib.net

PiperOrigin-RevId: 481064905

tensorflow/workspace2.bzl

@@ -571,10 +571,10 @@ def _tf_repositories():
     tf_http_archive(
         name = "zlib",
         build_file = "//third_party:zlib.BUILD",
-        sha256 = "91844808532e5ce316b3c010929493c0244f3d37593afd6de04f71821d5136d9",
-        strip_prefix = "zlib-1.2.12",
+        sha256 = "b3a24de97a8fdbc835b9833169501030b8977031bcb54b3b3ac13740f846ab30",
+        strip_prefix = "zlib-1.2.13",
         system_build_file = "//third_party/systemlibs:zlib.BUILD",
-        urls = tf_mirror_urls("https://zlib.net/zlib-1.2.12.tar.gz"),
+        urls = tf_mirror_urls("https://zlib.net/zlib-1.2.13.tar.gz"),
     )
 
     # LINT.IfChange

third_party/png.BUILD

@@ -61,7 +61,7 @@ genrule(
     name = "snappy_stubs_public_h",
     srcs = ["scripts/pnglibconf.h.prebuilt"],
     outs = ["pnglibconf.h"],
-    cmd = "sed -e 's/PNG_ZLIB_VERNUM 0/PNG_ZLIB_VERNUM 0x12c0/' $< >$@",
+    cmd = "sed -e 's/PNG_ZLIB_VERNUM 0/PNG_ZLIB_VERNUM 0x12d0/' $< >$@",
 )
 
 config_setting(