Fix `set` command for Boost 1.77

Change-Id: I0243ad9a8266f354a3136e0306b8dc799899f1df
Bug: https://tree.taiga.io/project/jktjkt-netconf-cli/issue/228
diff --git a/src/path_parser.hpp b/src/path_parser.hpp
index 0aace94..7ae9823 100644
--- a/src/path_parser.hpp
+++ b/src/path_parser.hpp
@@ -397,7 +397,7 @@
     x3::omit['/'] >> x3::attr(Scope::Absolute);
 
 auto const trailingSlash_def =
-    x3::omit['/'];
+    x3::no_skip[x3::omit['/']];
 
 auto const filterConfigFalse = [](const Schema& schema, const std::string& path) {
     return schema.isConfig(path);