Try to add cache

Author: RReverser

.github/workflows/conformu.yml

@@ -15,6 +15,13 @@ jobs:
     - uses: actions/checkout@v4
     - name: Download and unpack ConformU
       run: mkdir ~/conformu && curl -L https://github.com/ASCOMInitiative/ConformU/releases/download/v4.1.0/conformu.linux-x64.tar.xz | tar -xJ -C ~/conformu
+    - name: Cache .NET artifacts
+      uses: actions/cache@v4
+      with:
+        path: |
+          ASCOM.Alpaca.Simulators/bin
+          ASCOM.Alpaca.Simulators/obj
+        key: ${{ runner.os }}-dotnet
     - name: Build simulators
       run: dotnet build
       working-directory: ASCOM.Alpaca.Simulators