CI: Fix OpenSSL usage on Windows

Some undocumented change in the most recent Windows runner (or in a Qt
build - no idea) led to CMake getting misled and trying to use
an incomplete OpenSSL installation coming with Qt even when
tools_openssl is not chosen in aqtinstall. Given that it's always better
to use the same version of OpenSSL as that used by Qt, tools_openssl
is now actually installed on Windows.

.github/workflows/ci.yml

@@ -91,7 +91,7 @@ jobs:
         cache: true
         cache-key-prefix: Qt
         modules: ${{ matrix.qt-version == 6 && 'qtmultimedia' || '' }}
-        tools: tools_ninja
+        tools: "tools_ninja${{ startsWith(matrix.os, 'windows') && ' tools_openssl_x64' || '' }}"
 
     # Install on Linux via apt to get Qt built with OpenSSL 3
     - name: Install Qt (Linux)
@@ -118,7 +118,8 @@ jobs:
               ${{ runner.os != 'Linux' && '-DCMAKE_MAKE_PROGRAM=$IQTA_TOOLS/Ninja/ninja' || '' }} \
               -DCMAKE_PREFIX_PATH=~/.local \
               -DQuotient_ENABLE_E2EE=ON \
-              ${{ runner.os == 'macOS' && '-DOPENSSL_ROOT_DIR=`brew --prefix openssl`' || '' }} \
+              ${{ runner.os == 'macOS' && '-DOPENSSL_ROOT_DIR=`brew --prefix openssl`' ||
+                  runner.os == 'Windows' && '-DOPENSSL_ROOT_DIR=$IQTA_TOOLS/OpenSSL/*/' || '' }} \
               -DBUILD_SHARED_LIBS=${{ matrix.composition == 'dynamic' }} \
               -DBUILD_WITH_QT6=${{ matrix.qt-version == 6 }}" \
             >>$GITHUB_ENV