DOC: Clarify that vcpkg is optional and unsupported

doc/Install_develop.rst

@@ -51,15 +51,17 @@ If you want to build or install libcaosdb without the use of Conan, feel
 free to rewrite the CMakeLists.txt as needed. The CaosDB project is open
 to merge requests which support multiple ways of installation.
 
-Building with ``vcpkg``
-~~~~~~~~~~~~~~~~~~~~~~~
+Optional: Building with ``vcpkg``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Instead of Conan, you can use the vcpkg package manager to install the dependencies (`vcpkg.json`). It's included as 
-a submodule in the project. To install the dependencies, run the following commands:
+Next to Conan, you also have the option to use the vcpkg package manager to install the
+dependencies (`vcpkg.json`). Note, however, *vcpkg is not fully supported and tested*. It's
+included as a submodule in the project. To install the dependencies, run the following
+commands:
 
 .. code:: console
 
-   ./vcpkg/bootstrap-vcpkg.<sh/bat>
+   ./vcpkg/bootstrap-vcpkg.<sh/bat> -disableMetrics
    vcpkg/vcpkg install