add checkout step to deploy pipelines (#4717)

Re: https://github.com/tuskyapp/Tusky/pull/4682#issuecomment-2402485451
Ok that was quick.

According to the error message, that should fix the problem.

https://github.com/tuskyapp/Tusky/actions/runs/11256946411/job/31300028953

.github/workflows/deploy-release.yml

@@ -11,6 +11,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - uses: ./.github/workflows/check-and-build.yml
 
       - name: Build Blue aab

.github/workflows/deploy-test.yml

@@ -11,6 +11,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - uses: ./.github/workflows/check-and-build.yml
 
       - name: Build Green aab