Cater to yet missing libmemcached-vs17

Using libmemcached-vs16 instead should be fine.

Author: cmb69

.github/workflows/build-windows.yml

@@ -28,7 +28,9 @@ jobs:
           deps: zlib
           cache: true
       - name: Fetch libmemcached
-        run: curl -OLs https://downloads.php.net/~windows/pecl/deps/libmemcached-1.1.1-${{steps.setup-php.outputs.vs}}-${{matrix.arch}}.zip && 7z x libmemcached-1.1.1-${{steps.setup-php.outputs.vs}}-${{matrix.arch}}.zip -o..\deps
+        run: |
+          set MEMCACHED_FILENAME=libmemcached-1.1.1-${{steps.setup-php.outputs.vs == 'vs17' && 'vs16' || steps.setup-php.outputs.vs}}-${{matrix.arch}}.zip
+          curl -OLs https://downloads.php.net/~windows/pecl/deps/%MEMCACHED_FILENAME% && 7z x %MEMCACHED_FILENAME% -o..\deps
       - name: Enable Developer Command Prompt
         uses: ilammy/msvc-dev-cmd@v1
         with: