fix: rename changelog cache file

bin/clean-cache.js

@@ -2,6 +2,6 @@ const fs = require('fs-extra');
 const os = require('os');
 
 (async () => {
-  await fs.remove(os.tmpdir() + '/renovate-changelog-cache');
+  await fs.remove(os.tmpdir() + '/renovate-cache-changelog');
   await fs.remove(os.tmpdir() + '/renovate-npm-cache');
 })();

lib/workers/pr/changelog/source-cache.js

@@ -9,7 +9,7 @@ module.exports = {
 
 function getCache({ depName, fromVersion, newVersion }) {
   const tmpdir = process.env.RENOVATE_TMPDIR || os.tmpdir();
-  const cachePath = tmpdir + '/renovate-commits-cache';
+  const cachePath = tmpdir + '/renovate-cache-changelog';
   const cacheKey = `${depName}-${fromVersion}-${newVersion}`;
   return [cachePath, cacheKey];
 }