build: update conventional-changelog and simplify changelog gulp task (#25838)

The version prefix issue has been fixed with
conventional-changelog/conventional-changelog#179.

PR Close #25838

tools/gulp-tasks/changelog.js

@@ -9,11 +9,6 @@
 module.exports = (gulp) => () => {
   const conventionalChangelog = require('gulp-conventional-changelog');
   return gulp.src('CHANGELOG.md')
-      .pipe(conventionalChangelog({preset: 'angular', releaseCount: 1}, {
-        // Conventional Changelog Context
-        // We have to manually set version number so it doesn't get prefixed with `v`
-        // See https://github.com/conventional-changelog/conventional-changelog-core/issues/10
-        currentTag: require('../../package.json').version
-      }))
+      .pipe(conventionalChangelog({preset: 'angular'}))
       .pipe(gulp.dest('./'));
 };