Fix e2e tests on CI (lightspeed-core#2081)

Author: tisnik

.github/workflows/e2e_tests.yaml

@@ -24,7 +24,7 @@ jobs:
       E2E_LLAMA_HOSTNAME: ${{ vars.E2E_LLAMA_HOSTNAME || 'llama-stack' }}
 
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           # On PR_TARGET → the fork (or same repo) that opened the PR.
           # On push      → falls back to the current repository.

.github/workflows/e2e_tests_lightspeed_evaluation.yaml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v7
+        uses: actions/checkout@v4
         with:
           # On PR_TARGET → the fork (or same repo) that opened the PR.
           # On push      → falls back to the current repository.
@@ -47,7 +47,7 @@ jobs:
           git log --oneline -5
 
       - name: Checkout lightspeed-Evaluation
-        uses: actions/checkout@v7
+        uses: actions/checkout@v4
         with:
           repository: lightspeed-core/lightspeed-evaluation
           path: lightspeed-evaluation

.github/workflows/e2e_tests_rhaiis.yaml

@@ -38,7 +38,7 @@ jobs:
       E2E_DEFAULT_PROVIDER_OVERRIDE: vllm
 
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           # On PR_TARGET → the fork (or same repo) that opened the PR.
           # On push      → falls back to the current repository.