Auxiliary: Fix typos and spelling in comments

Auxiliary/vim/cmake.vim.in

@@ -9,7 +9,7 @@
 " Former Maintainer: Karthik Krishnan <[email protected]>
 " Last Change:  @DATE@
 "
-" Licence:      The CMake license applies to this file. See
+" License:      The CMake license applies to this file. See
 "               https://cmake.org/licensing
 "               This implies that distribution with Vim is allowed
 

Auxiliary/vim/indent/cmake.vim

@@ -5,7 +5,7 @@
 " Former Maintainer: Karthik Krishnan <[email protected]>
 " Last Change:  2017 Aug 30
 "
-" Licence:      The CMake license applies to this file. See
+" License:      The CMake license applies to this file. See
 "               https://cmake.org/licensing
 "               This implies that distribution with Vim is allowed
 

Auxiliary/vim/syntax/cmake.vim

@@ -9,7 +9,7 @@
 " Former Maintainer: Karthik Krishnan <[email protected]>
 " Last Change:  2020 oct. 28
 "
-" Licence:      The CMake license applies to this file. See
+" License:      The CMake license applies to this file. See
 "               https://cmake.org/licensing
 "               This implies that distribution with Vim is allowed