github: update Boost link for Windows workflow

Author: deniskovalchuk

.github/workflows/windows.yml

@@ -29,7 +29,7 @@ jobs:
       run: |
         # Download Boost.
         Invoke-WebRequest `
-            -Uri "https://boostorg.jfrog.io/artifactory/main/release/1.83.0/source/boost_1_83_0.7z" `
+            -Uri "https://archives.boost.io/release/1.88.0/source/boost_1_88_0.7z" `
             -OutFile boost.7z
         # Extract.
         7z x boost.7z
@@ -61,4 +61,4 @@ jobs:
 
     - name: Test cmdline
       working-directory: ${{github.workspace}}\build\app\cmdline\test\Release
-      run: .\cmdline_tests.exe
+      run: .\cmdline_tests.exe