fix: update librarian.js for containeranalysis to fix postproccessing issue

[pearigee]

This should fix #8478 which is breaking because this code incorrectly injects code into the middle of an import statement:

The new regex is /}\s*$/. Here is a quick breakdown of what it does and why it works better:

How it works:

• } matches a literal closing brace.
• \s* matches any trailing whitespace (like spaces or newlines) that might exist at the bottom of the file.
• $ anchors the match to the absolute end of the file/string.

Why it fixes the bug: The original regex (/^}/m) matched the first } that appeared at the start of a new line. Because prettier splits import type { ... } blocks across multiple lines, their closing brace ends up at the start of a line. This tricked the old regex into injecting the new method inside the imports, creating a syntax error.

[gemini-code-assist]

Code Review

This pull request updates the librarian.js script to adjust the indentation of the generated getGrafeasClient method and changes the replacement regex to target the end of the file. The review feedback points out that the new regex /}\s*$/ will consume the trailing newline of the file, which can cause linting or formatting issues, and suggests adding a trailing newline to the template literal to prevent this.

[quirogas]

Updates googleapis/librarian#5040