Fix: Correct Zstd capitalization in FindZstd.cmake

Summary:
X-link: facebook/folly#2379

This commit addresses a CMake warning due to inconsistent capitalization of the Zstd package name in FindZstd.cmake. This fixes issues with finding and using the Zstd library.

Tested on Cmake 3.28.3
X-link: facebookincubator/zstrong#1170

Reviewed By: terrelln

Differential Revision: D69284782

fbshipit-source-id: 4acc32705ae937f075e1531cae3449cfae0d84ec

build/fbcode_builder/CMake/FindZstd.cmake

@@ -30,7 +30,7 @@ SELECT_LIBRARY_CONFIGURATIONS(ZSTD)
 
 include(FindPackageHandleStandardArgs)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(
-    ZSTD DEFAULT_MSG
+    Zstd DEFAULT_MSG
     ZSTD_LIBRARY ZSTD_INCLUDE_DIR
 )