Force SwiftSyntax 602.x for Swift 6.2 CI job

On Swift 6.2, SPM resolves to SwiftSyntax 600.0.1 by default (per Package.swift),
which doesn't have the SwiftSyntax602 module. Use sed to temporarily force
SwiftSyntax 602.x so we actually test the SwiftSyntax602 code path.

This also may avoid the prebuilt binary linker conflicts that occur with
SwiftSyntax 600.0.1 on Swift 6.2.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: zhiqipan

.github/workflows/test.yml

@@ -77,6 +77,14 @@ jobs:
           node-version: '20'
       - name: Install TypeScript
         run: npm install --prefix Plugins/BridgeJS/Sources/TS2Swift/JavaScript
+      - name: Force SwiftSyntax 602 for Swift 6.2
+        if: matrix.swift-image == 'swift:6.2'
+        working-directory: Plugins/BridgeJS
+        run: |
+          # Force SwiftSyntax 602.x to test the SwiftSyntax602 code path
+          sed -i 's/from: "600.0.1"/from: "602.0.0"/' Package.swift
+          # Clean any cached resolution
+          rm -rf .build Package.resolved
       - name: Run BridgeJS tests
         run: swift test --package-path ./Plugins/BridgeJS