enable parallel for cmake, fixup for autotools

.github/workflows/windows.yml

@@ -593,6 +593,7 @@ jobs:
     timeout-minutes: 10
     env:
       toolchain-version: '0.59.1'
+      MAKEFLAGS: -j 4
     strategy:
       matrix:
         build: [autotools, cmake]
@@ -664,7 +665,7 @@ jobs:
           if [ '${{ matrix.build }}' = 'cmake' ]; then
             cmake --build bld
           else
-            make -j5 -C bld
+            make -C bld
           fi
 
       - name: 'curl info'
@@ -678,7 +679,7 @@ jobs:
           if [ '${{ matrix.build }}' = 'cmake' ]; then
             cmake --build bld --target testdeps
           else
-            make -j5 -C bld -C tests
+            make -C bld -C tests
           fi
 
       - name: 'build examples'
@@ -688,7 +689,7 @@ jobs:
           if [ '${{ matrix.build }}' = 'cmake' ]; then
             cmake --build bld --target curl-examples
           else
-            make -j5 -C bld examples
+            make -C bld examples
           fi
 
   msvc: