chore: run docs and cli builds on all PRs (#16954)

All the other workflows already do this.

.github/workflows/cli.yml

@@ -6,7 +6,6 @@ on:
       - 'cli/**'
       - '.github/workflows/cli.yml'
   pull_request:
-    branches: [main]
     paths:
       - 'cli/**'
       - '.github/workflows/cli.yml'

.github/workflows/docs-build.yml

@@ -3,7 +3,6 @@ on:
   push:
     branches: [main]
   pull_request:
-    branches: [main]
   release:
     types: [published]