Roll Zlib from b763971bcaa3 to 788cb3c270e8 (3 revisions)

https://chromium.googlesource.com/chromium/src/third_party/zlib.git/+log/b763971bcaa3..788cb3c270e8

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/zlib-pdfium
Please CC awscreen@google.com,thestig@chromium.org on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: awscreen@google.com
Change-Id: Iab7f00a2d2416959bb81f8189c594b3e80d2c4c9
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/128650
Bot-Commit: pdfium-autoroll <pdfium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: pdfium-autoroll <pdfium-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index aee2987..71208fa 100644
--- a/DEPS
+++ b/DEPS
@@ -228,7 +228,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.
-  'zlib_revision': 'b763971bcaa3e4c50a344035837a1dd60d7e6753',
+  'zlib_revision': '788cb3c270e8700b425c7bdca1f9ce6b0c1400a9',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.