Fix extending angularCompilerOptions from non relative extension less TypeScript configuration files

Editor assessment

The subject attempts real precision - extending angularCompilerOptions from non relative extension less TypeScript configuration files - but the missing hyphens turn it into a parse puzzle, and the body's article-free fragment, support non rooted file of node package and relative path without json extension, does not fully resolve it. The compiler-cli scope and fix type are right, and the issue is linked, but the message demands decoding effort. Restoring the hyphens and writing the body in full sentences would have preserved the genuine precision the commit actually contains.