Help: Fixed typo in CMAKE_INSTALL_RPATH_USE_LINK_PATH.rst

Signed-off-by: Jaak Ristioja <[email protected]>

Help/variable/CMAKE_INSTALL_RPATH_USE_LINK_PATH.rst

@@ -9,5 +9,5 @@ any directories outside the project that are in the linker search path or
 contain linked library files.  The directories are appended after the
 value of the :prop_tgt:`INSTALL_RPATH` target property.
 
-This varibale is used to initialize the target property
+This variable is used to initialize the target property
 :prop_tgt:`INSTALL_RPATH_USE_LINK_PATH` for all targets.