bump date and make CI happy

CppCoreGuidelines.md

@@ -1,6 +1,6 @@
 # <a name="main"></a>C++ Core Guidelines
 
-October 6, 2022
+April 13, 2023
 
 Editors:
 
@@ -19761,15 +19761,19 @@ Additions to `std` might clash with future versions of the standard.
 ##### Example
 
     namespace std { // BAD: violates standard
+
     class My_vector {
         //     . . .
     };
+
     }
 
     namespace Foo { // GOOD: user namespace is allowed
+
     class My_vector {
         //     . . .
     };
+
     }
 
 ##### Enforcement

scripts/hunspell/isocpp.dic

@@ -671,6 +671,8 @@ x22
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