fix spelling error and add false positives for spellchecking

doc/src/Python_install.txt

@@ -25,7 +25,7 @@ run "make install-python" or run the python/install.py script explicitly :ul
 
 When calling "make install-python" LAMMPS will try to install the
 python module and the shared library into the python site-packages folders;
-either the system-wide ones, or the local users ones (in case of unsufficient
+either the system-wide ones, or the local users ones (in case of insufficient
 permissions for the global install). Python will then find the module
 and shared library file automatically.
 

doc/utils/sphinx-config/false_positives.txt

@@ -250,6 +250,7 @@ Boresch
 Botero
 Botu
 Bouguet
+Bourne
 boxcolor
 bp
 bpls
@@ -627,6 +628,7 @@ dVx
 dW
 dx
 dy
+dylib
 dyn
 dyne
 dynes
@@ -1298,6 +1300,7 @@ Kondor
 konglt
 Koning
 Kooser
+Korn
 Koskinen
 Koster
 Kosztin