ci: disable fail-fast on test matrices

The test-linux and test-windows jobs did not set fail-fast, so GitHub
Actions defaulted to fail-fast: true. A single transient failure — often
during the multi-minute SQL Server setup phase — cancelled every other
in-progress and queued sibling job in the matrix. Those cancelled jobs
would otherwise have passed, and re-running forced the entire expensive
setup to be redone for all combinations.

Setting fail-fast: false on both matrices lets the rest of the matrix
keep running when one combination fails.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dhensby

.github/workflows/nodejs.yml

@@ -66,6 +66,7 @@ jobs:
     env:
       MSSQL_PASSWORD: 'yourStrong(!)Password'
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-24.04]
         node: [18.x, 20.x, 22.x, 24.x]
@@ -113,6 +114,7 @@ jobs:
     env:
       MSSQL_PASSWORD: 'yourStrong(!)Password'
     strategy:
+      fail-fast: false
       matrix:
         os: [windows-2022, windows-2025]
         node: [18.x, 20.x, 22.x, 24.x]