Merge "Updated translations" commits function fails if a commit does not have an id

[pomek]

📝 Provide detailed reproduction steps (if any)

When executing the generateChangelogForMonoRepository() function with additional private repositories, the private repository may contain a commit with updated translations (Updated translations.).

If merging such the commit, the function ends with an error because it doesn't check whether a link to the was added in the entry.

const newLine = line + ' ' + removedEntries.map( entry => {
	return entry.match( /(\(\[commit\].*)$/ )[ 1 ];
} ).join( ' ' );

✔️ Expected result

No error.

❌ Actual result

📍 Generating the changelog...
events.js:353
      throw er; // Unhandled 'error' event
      ^

TypeError: Cannot read property '1' of null
    at /Users/pomek/Projects/ckeditor/ckeditor5/node_modules/@ckeditor/ckeditor5-dev-env/lib/release-tools/utils/generatechangelog.js:111:45
    at Array.map (<anonymous>)
    at /Users/pomek/Projects/ckeditor/ckeditor5/node_modules/@ckeditor/ckeditor5-dev-env/lib/release-tools/utils/generatechangelog.js:110:47

❓ Possible solution

• Check if match is not null.
• Filter invalid items before mapping.