fix(node): Add note to refresh linker cache after installation

Signed-off-by: Steffen Vogel <steffen.vogel@opal-rt.com>

Author: stv0g

docs/node/installation.md

@@ -225,6 +225,9 @@ You can also install the binaries and tools into to your search path after build
 ```shell
 # Install the VILLASnode libraries tools and binaries
 cmake --build ./build --target install
+
+# Refresh linker cache
+sudo ldconfig
 ```
 
 ### Customizing the build