build: update github actions to latest revisions of dev-infra

Updates the Github actions to latest revisions. The github
actions now correctly deal with `state: breaking change`
label.

Author: devversion

.github/workflows/dev-infra.yml

@@ -9,6 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: angular/dev-infra/github-actions/breaking-changes-label@861dc90572784e714aeaa9dfb20ceebeb57cdb07
+      - uses: angular/dev-infra/github-actions/breaking-changes-label@3f4646c252bc54b2ae93b4e322ebde9030de30b2
         with:
           angular-robot-key: ${{ secrets.ANGULAR_ROBOT_PRIVATE_KEY }}

.github/workflows/lock-closed.yml

@@ -9,6 +9,6 @@ jobs:
   lock_closed:
     runs-on: ubuntu-latest
     steps:
-      - uses: angular/dev-infra/github-actions/lock-closed@7679cff885633cd33bf5ac7922a5304e8971a5a6
+      - uses: angular/dev-infra/github-actions/lock-closed@3f4646c252bc54b2ae93b4e322ebde9030de30b2
         with:
           lock-bot-key: ${{ secrets.LOCK_BOT_PRIVATE_KEY }}