Fix Pro workflows: use correct working-directory for detect-changes

The Pro workflows have defaults.run.working-directory set to react_on_rails_pro.
Using working-directory: .. was attempting to go outside the workspace.
Changed to working-directory: . to run from workspace root where the script exists.

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

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

Author: justin808

.github/workflows/pro-integration-tests.yml

@@ -24,7 +24,7 @@ jobs:
           persist-credentials: false
       - name: Detect relevant changes
         id: detect
-        working-directory: ..
+        working-directory: .
         run: |
           BASE_REF="${{ github.event.pull_request.base.sha || github.event.before || 'origin/master' }}"
           script/ci-changes-detector "$BASE_REF"

.github/workflows/pro-lint.yml

@@ -24,7 +24,7 @@ jobs:
           persist-credentials: false
       - name: Detect relevant changes
         id: detect
-        working-directory: ..
+        working-directory: .
         run: |
           BASE_REF="${{ github.event.pull_request.base.sha || github.event.before || 'origin/master' }}"
           script/ci-changes-detector "$BASE_REF"

.github/workflows/pro-package-tests.yml

@@ -24,7 +24,7 @@ jobs:
           persist-credentials: false
       - name: Detect relevant changes
         id: detect
-        working-directory: ..
+        working-directory: .
         run: |
           BASE_REF="${{ github.event.pull_request.base.sha || github.event.before || 'origin/master' }}"
           script/ci-changes-detector "$BASE_REF"