Add bounded BPF egress pacer tutorial

.github/workflows/test-libbpf.yml

@@ -20,6 +20,7 @@ jobs:
         submodules: 'recursive'
     - name: install deps
       run: |
+        sudo apt-get update
         sudo apt-get install -y --no-install-recommends \
         libelf1 libelf-dev zlib1g-dev \
         make git clang llvm pkg-config build-essential dwarves \
@@ -179,6 +180,10 @@ jobs:
       run: |
           make -C src/50-tcx
 
+    - name: test 53 egress pacer
+      run: |
+          make -C src/53-egress-pacer
+
     - name: test features bpf_token
       run: |
           make -C src/features/bpf_token