externals: Update fmt to 9.0.0

Merge commit 'a7f9129f18b171ecec9533921ba32449b3c394ac'

externals/fmt/.github/workflows/windows.yml

@@ -2,31 +2,34 @@ name: windows
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
-        # windows-2016 and windows-2019 have MSVC 2017 and 2019 installed
-        # respectively: https://github.com/actions/virtual-environments.
-        os: [windows-2016, windows-2019]
+        # windows-2019 has MSVC 2019 installed;
+        # windows-2022 has MSVC 2022 installed:
+        # https://github.com/actions/virtual-environments.
+        os: [windows-2019]
         platform: [Win32, x64]
         build_type: [Debug, Release]
         standard: [11, 17, 20]
         include:
-          - os: windows-2016
+          - os: windows-2019
             platform: Win32
             build_type: Debug
             shared: -DBUILD_SHARED_LIBS=ON
-        exclude:
-          - os: windows-2016
-            platform: Win32
-          - os: windows-2016
-            standard: 17
-          - os: windows-2016
+          - os: windows-2022
+            platform: x64
+            build_type: Debug
             standard: 20
+        exclude:
           - os: windows-2019
             standard: 11
+            platform: Win32
           - os: windows-2019
             standard: 20
             platform: Win32