docs: change sphinx HTML theme to furo

Change-Id: Ia51285eadc19beeb051ce102502544e85442cb9c
diff --git a/libndn-cxx.pc.in b/libndn-cxx.pc.in
index 4db805f..dfb2fb5 100644
--- a/libndn-cxx.pc.in
+++ b/libndn-cxx.pc.in
@@ -4,7 +4,7 @@
 includedir=@includedir@
 
 Name: libndn-cxx
-Description: NDN C++ library with eXperimental eXtensions
+Description: NDN C++ Library
 Version: @VERSION@
 Libs: -L${libdir} @EXTRA_LINKFLAGS@ @EXTRA_LDFLAGS@ -lndn-cxx @EXTRA_LIBS@ @EXTRA_FRAMEWORKS@
 Cflags: -I${includedir} @EXTRA_CXXFLAGS@ @EXTRA_INCLUDES@