TT#124273 GitHub actions: upgrade from bullseye to bookworm

bookworm is the current Debian stable release as of 2023-06-10,
so switch from bullseye to bookworm.

Change-Id: I7df785862dd6a1466d426c147dce5877e66ec9d3

.github/actions/debpkg-bookworm/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:bullseye
+FROM debian:bookworm
 
 COPY entrypoint.sh /entrypoint.sh
 

.github/actions/debpkg-bookworm/action.yml

@@ -0,0 +1,6 @@
+name: "Build Docker image based on Debian/bookworm"
+description: "Build Docker image based on Debian/bookworm"
+
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

.github/actions/debpkg-bullseye/action.yml

@@ -1,6 +0,0 @@
-name: "Build Docker image based on Debian/bullseye"
-description: "Build Docker image based on Debian/bullseye"
-
-runs:
-  using: 'docker'
-  image: 'Dockerfile'

.github/workflows/debpkg.yml

@@ -7,16 +7,16 @@ on:
     - cron: '0 8 * * *'
 
 jobs:
-  build-deb-bullseye:
+  build-deb-bookworm:
     runs-on: ubuntu-latest
-    name: Debian pipeline for bullseye
+    name: Debian pipeline for bookworm
 
     steps:
     - name: Checkout source
       uses: actions/checkout@v3
 
     - name: Execute Docker debpkg action
-      uses: ./.github/actions/debpkg-bullseye
+      uses: ./.github/actions/debpkg-bookworm
 
     - name: Store Debian package artifacts
       uses: actions/upload-artifact@v3