Upgrade GitHub Actions for Node 24 compatibility (#967)

Signed-off-by: Salman Muin Kayser Chishti <13schishti@gmail.com>

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
@@ -54,7 +54,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
@@ -161,7 +161,7 @@ jobs:
         model: [gpt-5-minimal, gpt-4.1, sonnet-4.5, gemini-pro, haiku]
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
@@ -190,7 +190,7 @@ jobs:
     if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository) }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2

.github/workflows/letta.yml

@@ -15,7 +15,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 1
       - uses: letta-ai/letta-code-action@v0

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
       id-token: write  # Required for npm OIDC trusted publishing
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           fetch-depth: 0
@@ -37,7 +37,7 @@ jobs:
           bun-version: 1.3.0
 
       - name: Setup Node (for npm OIDC publishing)
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: "22"