CI: windows: Use possibly faster device for TMP/TEMP

Author: nobu

.github/workflows/windows.yml

@@ -113,8 +113,8 @@ jobs:
             -arch=${{ matrix.target || 'amd64' }} ^
             ${{ matrix.vcvars && '-vcvars_ver=' || '' }}${{ matrix.vcvars }}
           nmake -f nul
-          set TMP=%USERPROFILE%\AppData\Local\Temp
-          set TEMP=%USERPROFILE%\AppData\Local\Temp
+          set TMP=%RUNNER_TEMP%
+          set TEMP=%RUNNER_TEMP%
           set MAKEFLAGS=l
           set /a TEST_JOBS=(15 * %NUMBER_OF_PROCESSORS% / 10) > nul
           set RUBY_OPT_DIR=%GITHUB_WORKSPACE:\=/%/src/vcpkg_installed/%VCPKG_DEFAULT_TRIPLET%