wireshark: fix typo in PACKAGECONFIG[zstd]

ENABLE_STTD is a typo, correct option is ENABLE_ZSTD.

This patches the following CMake warning in do_configure:
  Manually-specified variables were not used by the project: ENABLE_STTD
After, do_configure does not show the warning.

Github issue: openembedded/meta-openembedded#845

Reported-by: Ludovic Jozeau <ludovic.jozeau@smile.fr>
Reviewed-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Ghislain Mangé <ghislain.mange@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-support/wireshark/wireshark_4.2.7.bb

@@ -42,7 +42,7 @@ PACKAGECONFIG[plugins] = "-DENABLE_PLUGINS=ON,-DENABLE_PLUGINS=OFF"
 PACKAGECONFIG[sbc] = "-DENABLE_SBC=ON,-DENABLE_SBC=OFF, sbc"
 PACKAGECONFIG[libssh] = "-DENABLE_LIBSSH=ON,-DENABLE_LIBSSH=OFF, libssh2"
 PACKAGECONFIG[lz4] = "-DENABLE_LZ4=ON,-DENABLE_LZ4=OFF, lz4"
-PACKAGECONFIG[zstd] = "-DENABLE_STTD=ON,-DENABLE_ZSTD=OFF, zstd"
+PACKAGECONFIG[zstd] = "-DENABLE_ZSTD=ON,-DENABLE_ZSTD=OFF, zstd"
 PACKAGECONFIG[nghttp2] = "-DENABLE_NGHTTP2=ON,-DENABLE_NGHTTP2=OFF, nghttp2"
 
 # these next two options require addional layers