Update the PR process doc to come back to one reviewer

 with optional additional reviewers

Author: manuroe

changelog.d/6396.doc

@@ -0,0 +1 @@
+Update the PR process doc to come back to one reviewer with optional additional reviewers.

docs/pull_request.md

@@ -83,15 +83,16 @@ Exceptions can occur:
 
 ##### PR Review Assignment
 
-We use automatic assignment for PR reviews. A PR is automatically routed by GitHub to 2 team members using the round robin algorithm. The process is the following:
+We use automatic assignment for PR reviews. **A PR is automatically routed by GitHub to one team member** using the round robin algorithm. Additional reviewers can be used for complex changes or when the first reviewer is not confident enough on the changes.
+The process is the following:
 
-- The PR creator can assign specific people if they have another Android developer in their team or they think a specific reviewer should take a look at the PR.
-- If there are missing reviewers, the PR creator assigns the [element-android-reviewers](https://github.com./orgs/vector-im/teams/element-android-reviewers) team as a reviewer.
-- GitHub automatically assigns other reviewers. If one of the chosen reviewers is not available (holiday, etc.), remove them and set again the team, GitHub will select another reviewer.
+- The PR creator selects the [element-android-reviewers](https://github.com./orgs/vector-im/teams/element-android-reviewers) team as a reviewer.
+- GitHub automatically assign the reviewer. If the reviewer is not available (holiday, etc.), remove them and set again the team, GitHub will select another reviewer.
+- Alternatively, the PR creator can directly assign specific people if they have another Android developer in their team or they think a specific reviewer should take a look at their PR.
 - Reviewers get a notification to make the review: they review the code following the good practice (see the rest of this document).
 - After making their own review, if they feel not confident enough, they can ask another person for a full review, or they can tag someone within a PR comment to check specific lines.
 
-For PRs coming from the community, the issue wrangler can assign either the team [element-android-reviewers](https://github.com./orgs/vector-im/teams/element-android-reviewers) or any members directly.
+For PRs coming from the community, the issue wrangler can assign either the team [element-android-reviewers](https://github.com./orgs/vector-im/teams/element-android-reviewers) or any member directly.
 
 ##### PR review time
 
@@ -102,6 +103,7 @@ Some tips to achieve it:
 - Set up your GH notifications correctly
 - Check your pulls page: [https://github.com./pulls](https://github.com./pulls)
 - Check your pending assigned PRs before starting or resuming your day to day tasks
+- If you are busy with high priority tasks, inform the author. They will find another developer
 
 It is hard to define a deadline for a review. It depends on the PR size and the complexity. Let's start with a goal of 24h (working day!) for a PR smaller than 500 lines. If bigger, the submitter and the reviewer should discuss.