Enable -Werror for FreeBSD build

Author: iluuu1994

.github/actions/freebsd/action.yml

@@ -78,6 +78,7 @@ runs:
             --enable-intl \
             --with-mhash \
             --with-sodium \
+            --enable-werror \
             --with-config-file-path=/etc \
             --with-config-file-scan-dir=/etc/php.d
           gmake -j2