keychain/all: bump deps

Generated and committed by [Conan Center Bump Deps](https://github.com/ericLemanissier/conan-center-index-bump-deps)
Find more updatable recipes in the [GitHub Pages](https://ericlemanissier.github.io/conan-center-index-bump-deps/)

recipes/keychain/all/conanfile.py

@@ -38,7 +38,7 @@ def requirements(self):
 
     def build_requirements(self):
         if self.settings.os == "Linux":
-            self.tool_requires("pkgconf/1.9.3")
+            self.tool_requires("pkgconf/1.9.5")
 
     def layout(self):
         cmake_layout(self, src_folder="src")