Cargo update cow only

.github/workflows/update-cow-dependencies.yaml

@@ -33,10 +33,22 @@ jobs:
         run: |
           sed -i '/git = "https:\/\/github.com\/cowprotocol\/services.git"/s/tag = "v[0-9]*\.[0-9]*\.[0-9]*"/tag = "${{ env.TAG }}"/g' ./Cargo.toml
 
-      - name: Update Cargo.lock
-        run: cargo update
+      - name: Identify and update specific CoW dependencies in Cargo.lock
+        run: |
+          PACKAGES=$(grep -oP 'package = "\K[^"]*' <(grep -B1 'git = "https:\/\/github.com\/cowprotocol\/services.git"' Cargo.toml))
+          echo "Identified packages: $PACKAGES"
+          for package in $PACKAGES; do
+            echo "Updating package: $package"
+            cargo update -p $package
+          done
+
+      - name: Check for changes
+        id: check_changes
+        run: |
+          git diff --exit-code || echo "CHANGES_DETECTED=true" >> $GITHUB_ENV
 
       - name: Commit changes
+        if: env.CHANGES_DETECTED == 'true'
         run: |
           git config --global user.name 'Your Name'
           git config --global user.email 'your-email@example.com'
@@ -45,13 +57,14 @@ jobs:
           git push --set-upstream origin update-cow-dependencies/${{ env.TAG }}
 
       - name: Extract commit message
-        id: commit
+        if: env.CHANGES_DETECTED == 'true'
         run: |
           echo "branch=$(git rev-parse --abbrev-ref HEAD)" >> $GITHUB_OUTPUT
           echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
           echo "pr_body=Updated CoW dependencies to ${{ env.TAG }}" >> $GITHUB_OUTPUT
 
       - name: Create Pull Request
+        if: env.CHANGES_DETECTED == 'true'
         uses: repo-sync/pull-request@v2
         with:
           source_branch: ${{ steps.commit.outputs.branch }}