feat: add a changelog-host parameter to action.yml (#550)

* Add a changelog-host parameter to action.yml.

Fixes https://github.com/google-github-actions/release-please-action/issues/525

* fix default changelog-host

Co-authored-by: Jeff Ching <chingor@google.com>
Signed-off-by: Jeffrey Rennie <rennie@google.com>

Signed-off-by: Jeffrey Rennie <rennie@google.com>
Co-authored-by: Jeff Ching <chingor@google.com>

action.yml

@@ -36,6 +36,10 @@ inputs:
     description: 'specify a CHANGELOG path other than the root CHANGELOG.md'
     required: false
     default: ''
+  changelog-host:
+    description: 'The proto://host where commits live.'
+    required: false
+    default: 'https://github.com'
   command:
     description: 'release-please command to run, either "github-release", or "release-pr" (defaults to running both)'
     required: false

index.js

@@ -113,6 +113,7 @@ async function manifestInstance (github) {
   const path = core.getInput('path') || undefined
   const releaseType = core.getInput('release-type', { required: true })
   const changelogPath = core.getInput('changelog-path') || undefined
+  const changelogHost = core.getInput('changelog-host') || undefined
   const changelogTypes = core.getInput('changelog-types') || undefined
   const changelogSections = changelogTypes && JSON.parse(changelogTypes)
   const versionFile = core.getInput('version-file') || undefined
@@ -129,6 +130,7 @@ async function manifestInstance (github) {
       packageName,
       releaseType,
       changelogPath,
+      changelogHost,
       changelogSections,
       versionFile,
       extraFiles,