C++: Add a 1.25 change note file (didn't we used to have templates for these?).
C++: Add a 1.25 change note file (didn't we used to have templates for these?).

github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql