Update docs

Author: petk

cmake/cmake/modules/FindICU.cmake

@@ -9,7 +9,6 @@ This module overrides the upstream CMake `FindICU` module with few
 customizations:
 
 * Added pkg-config.
-* Marked `ICU_INCLUDE_DIR` as advanced variable (fixed upstream in CMake 3.29).
 #]=============================================================================]
 
 include(FeatureSummary)

cmake/cmake/modules/FindLibXslt.cmake

@@ -1,15 +1,10 @@
 #[=============================================================================[
 # FindLibXslt
 
-Find the XSLT library (LibXslt).
+Find the XSLT library (LibXslt). This module overrides the upstream CMake
+`FindLibXslt` module.
 
 See: https://cmake.org/cmake/help/latest/module/FindLibXslt.html
-
-Module overrides the upstream CMake `FindLibXslt` module with few
-customizations:
-
-* Marked `LIBXSLT_EXSLT_INCLUDE_DIR` and `LIBXSLT_LIBRARY` as advanced variables
-  (fixed upstream in CMake 3.28).
 #]=============================================================================]
 
 include(FeatureSummary)