Address Copilot review feedback: restrict coverage matrix to ubuntu-24.04

Author: jdaugherty

.github/workflows/coverage.yml

@@ -34,7 +34,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04, macos-latest, windows-latest]
+        os: [ubuntu-24.04]
     runs-on: ${{ matrix.os }}
     steps:
       - name: "📥 Checkout repository"
@@ -67,7 +67,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04, macos-latest, windows-latest]
+        os: [ubuntu-24.04]
     runs-on: ${{ matrix.os }}
     steps:
       - name: "📥 Checkout repository"