Add latest clang and gcc to Weekly build

The latest versions given by aminya/setup-cpp are:
- gcc-13.1
- clang-17.0.6

.github/workflows/weekly.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        clang-version: [5, 7, 9, 11, 13, 15]
+        clang-version: [5, 7, 9, 11, 13, 15, 17]
     steps:
       - name: Setup Clang
         uses: aminya/setup-cpp@v1
@@ -76,7 +76,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        gcc-version: [7, 9, 11]
+        gcc-version: [7, 9, 11, 13]
     steps:
       - name: Setup GCC
         uses: aminya/setup-cpp@v1