Update github action workflows (#130) (#135)

* Use on `push` only on stable branches to avoid duplicate runs
* Update project automation

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>

.github/workflows/ci.yml

@@ -1,14 +1,20 @@
 name: Ubuntu CI
 
-on: [push, pull_request]
+on:
+  pull_request:
+  push:
+    branches:
+      - 'ign-tools[0-9]'
+      - 'gz-tools[0-9]'
+      - 'main'
 
 jobs:
   focal-ci:
     runs-on: ubuntu-latest
     name: Ubuntu Focal CI
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Compile and test
         id: ci
         uses: gazebo-tooling/action-gz-ci@focal
@@ -17,7 +23,7 @@ jobs:
     name: Ubuntu Jammy CI
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Compile and test
         id: ci
         uses: gazebo-tooling/action-gz-ci@jammy

.github/workflows/triage.yml

@@ -14,4 +14,3 @@ jobs:
         with:
           project-url: https://github.com/orgs/gazebosim/projects/7
           github-token: ${{ secrets.TRIAGE_TOKEN }}
-