Update CI workflows runners.

Author: OmniBlade

.github/workflows/linux.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         cc: [clang, gcc]
-        os: [ubuntu-20.04, ubuntu-24.04]
+        os: [ubuntu-22.04, ubuntu-24.04]
         include:
           - cc: clang
             cxx: clang++

.github/workflows/windows.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         platform: [x86, amd64]
-        os: [windows-2019, windows-2022]
+        os: [windows-2022, windows-2025]
     steps:
     - uses: actions/checkout@v4
       with: