fix(ci): install tomli for version bump workflows

The version bump scripts now use tomli/tomllib to parse TOML files
properly. Since GitHub Actions runners use Python 3.10 which doesn't
have the built-in tomllib module, we need to install the tomli package.

This ensures the workflows can run successfully when bumping versions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Kangyan-Zhou

.github/workflows/bot-bump-kernel-version.yml

@@ -26,6 +26,10 @@ jobs:
         with:
           python-version: '3.10'
 
+      - name: Install Python dependencies
+        run: |
+          pip install tomli
+
       - name: Configure Git and branch
         run: |
           git config user.name "sglang-bot"

.github/workflows/bot-bump-sglang-version.yml

@@ -26,6 +26,10 @@ jobs:
         with:
           python-version: '3.10'
 
+      - name: Install Python dependencies
+        run: |
+          pip install tomli
+
       - name: Configure Git and branch
         run: |
           git config user.name "sglang-bot"

scripts/release/utils.py

@@ -106,18 +106,17 @@ def replace_in_file(file_path: Path, old_version: str, new_version: str) -> bool
 
             # Check if [project] section exists and has version field
             if "project" not in toml_data or "version" not in toml_data["project"]:
-                print(f"Warning: {file_path} does not have [project] version field, skipping")
+                print(
+                    f"Warning: {file_path} does not have [project] version field, skipping"
+                )
                 return False
 
             # Use regex to replace only the version field in [project] section
             # This pattern matches the version field that comes after [project]
             # and before any other section marker
             pattern = r'(\[project\].*?version\s*=\s*)["\']([^"\']+)["\']'
             new_content = re.sub(
-                pattern,
-                rf'\g<1>"{new_version}"',
-                content,
-                flags=re.DOTALL
+                pattern, rf'\g<1>"{new_version}"', content, flags=re.DOTALL
             )
         except Exception as e:
             print(f"Warning: Failed to parse {file_path} as TOML: {e}")