chore: fix action runner (#2728)

For #2714

Author: JoeWang1127

.github/workflows/librarian.yaml

@@ -17,10 +17,10 @@ permissions:
   contents: read
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v6
         with:
           go-version-file: "go.mod"
       - name: Display Go version
@@ -46,10 +46,10 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
   e2e-test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v6
         with:
           go-version-file: "go.mod"
       - name: Install tools

.github/workflows/multi_approvers.yaml

@@ -32,7 +32,7 @@ concurrency:
   cancel-in-progress: true
 jobs:
   multi-approvers:
-    runs-on: 'ubuntu-latest'
+    runs-on: ubuntu-24.04
     steps:
       - name: 'Multi-approvers'
         uses: 'abcxyz/actions/.github/actions/multi-approvers@893209ed79a3d2508eeec375ffaf3d21012f5cd0'