GH Actions: Newer version of run-vcpkg, older version of Windows

The 'windows-latest' image is now windows-2022, but the vcpkg we're
using doesn't know to look for visual studio 2022. Reverting to use
windows-2019 so vcpkg works with it.

Also switching to the run-vcpkg v7.4. Not going with the new v10 series
because that changes the inputs and I'm not ready to figure out how to
change the params to make it work.

.github/workflows/cmake.yml

@@ -21,7 +21,7 @@ env:
 
 jobs:
   build-windows:
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     steps:
       - uses: actions/checkout@v1
@@ -39,7 +39,7 @@ jobs:
       # Restore from cache the previously built ports. If cache-miss, download, build vcpkg ports.
       - name: Restore vcpkg ports from cache or install vcpkg
         # Download and build vcpkg, without installing any port. If content is cached already, it is a no-op.
-        uses: lukka/run-vcpkg@v5
+        uses: lukka/run-vcpkg@v7.4
         id: runvcpkg
         with:
           vcpkgArguments: "curl[openssl] json-c libxml2 pcre2 check pthreads zlib pdcurses bzip2"