.github: minor fixes

 - bump GitHub Actions to Node.js 24 compatible versions
 - simplify, skip apt update
 - prevent duplicate jobs

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

.github/workflows/build.yml

@@ -11,6 +11,10 @@ on:
     branches:
       - '**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     # Verify we can build on latest Ubuntu with both gcc and clang
@@ -26,9 +30,8 @@ jobs:
     steps:
       - name: Install dependencies
         run: |
-          sudo apt-get -y update
           sudo apt-get -y install tree tshark valgrind libssl-dev
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Configure
         run: |
           set -x
@@ -63,7 +66,7 @@ jobs:
         run: |
           cd build/dir
           make check || (cat test/test-suite.log; false)
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: ${{ matrix.compiler }}-test-logs
           path: build/dir/test/*.log

.github/workflows/coverity.yml

@@ -15,8 +15,8 @@ jobs:
   coverity:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/cache@v4
+      - uses: actions/checkout@v6
+      - uses: actions/cache@v5
         id: coverity-toolchain-cache
         with:
           path: cov-analysis-linux64
@@ -53,7 +53,7 @@ jobs:
             --form description="${PROJECT_NAME} $(git rev-parse HEAD)" \
             https://scan.coverity.com/builds?project=${COVERITY_PROJ}
       - name: Upload build.log
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coverity-build.log
           path: cov-int/build-log.txt

.github/workflows/release.yml

@@ -11,10 +11,9 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Installing dependencies ...
         run: |
-          sudo apt-get -y update
           sudo apt-get -y install tree tshark valgrind
       - name: Creating Makefiles ...
         run: |