externals: Update fmt to 9.0.0

Merge commit 'a7f9129f18'

externals/fmt/.github/workflows/linux.yml

@@ -2,6 +2,9 @@ name: linux
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}
@@ -20,6 +23,11 @@ jobs:
             std: 14
             install: sudo apt install g++-8
             os: ubuntu-18.04
+          - cxx: g++-8
+            build_type: Debug
+            std: 17
+            install: sudo apt install g++-8
+            os: ubuntu-18.04
           - cxx: g++-10
             build_type: Debug
             std: 17
@@ -29,6 +37,12 @@ jobs:
             std: 20
             os: ubuntu-20.04
             install: sudo apt install g++-11
+          - cxx: clang++-8
+            build_type: Debug
+            std: 17
+            cxxflags: -stdlib=libc++
+            os: ubuntu-18.04
+            install: sudo apt install clang-8 libc++-8-dev libc++abi-8-dev
           - cxx: clang++-9
             build_type: Debug
             fuzz: -DFMT_FUZZ=ON -DFMT_FUZZ_LINKMAIN=ON
@@ -52,6 +66,7 @@ jobs:
     - name: Create Build Environment
       run: |
         ${{matrix.install}}
+        sudo apt update
         sudo apt install locales-all
         cmake -E make_directory ${{runner.workspace}}/build