chore(ci): use syscalls-bumper composite action.

Signed-off-by: Federico Di Pierro <[email protected]>

.github/workflows/update-syscalls.yml

@@ -7,29 +7,26 @@ on:
 
 jobs:
   update-syscalls:
-    runs-on: ubuntu-latest
-    container:
-      image: falcosecurity/syscalls-bumper:latest
     permissions:
       contents: write
       pull-requests: write
+    runs-on: ubuntu-latest
     steps:
-      - name: Git set-up
-        run: |
-          apk update && apk add git
-
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           ref: master
-
+          path: libs
+
       - name: Bump syscalls
-        run: |
-          syscalls-bumper --repo-root $(pwd) --overwrite
-          
+        uses: falcosecurity/syscalls-bumper@latest
+        with:
+          repo-root: libs
+
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@153407881ec5c347639a548ade7d8ad1d6740e38 # v5.0.2
         with:
+          path: libs
           signoff: true
           base: master
           branch: update/syscalls