fix(ci): Turn off nightly CI for forks (for windows)

We tried to do this in 2074, but didn't disable Windows.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

.github/workflows/ci.yml

@@ -566,7 +566,7 @@ jobs:
 
 
   windows:
-    if: ${{ ! contains(github.ref, 'linux-only') && ! contains(github.ref, 'macos-only') && ! contains(github.ref, 'optix-only') }}
+    if: ${{ (github.event.repository.fork == false || github.event_name != 'schedule') && ! contains(github.ref, 'linux-only') && ! contains(github.ref, 'macos-only') && ! contains(github.ref, 'optix-only') }}
     name: "${{matrix.desc}}"
     uses: ./.github/workflows/build-steps.yml
     with: