deps: fix typo in zlib.gyp that break arm-fpu-neon build

PR-URL: #35659
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

deps/zlib/zlib.gyp

@@ -122,7 +122,7 @@
                     ['OS=="linux"', {
                       'defines': [ 'ARMV8_OS_LINUX' ],
                     }],
-                    ['OS="win"', {
+                    ['OS=="win"', {
                       'defines': [ 'ARMV8_OS_WINDOWS' ],
                     }],
                     ['OS!="android" and OS!="win" and llvm_version=="0.0"', {