ci: fail slowly

Instead of cancelling all test/build jobs in the matrix if one fails,
allow remaining jobs to continue.

This lowers the impact of transient errors on CI and provides more
complete testing feedback on submissions.

.github/workflows/ble-test.yml

@@ -31,6 +31,7 @@ jobs:
   run-tests:
     needs: collect-tests
     strategy:
+      fail-fast: false
       matrix:
         test: ${{ fromJSON(needs.collect-tests.outputs.test-dirs) }}
     runs-on: ubuntu-latest

.github/workflows/build.yml

@@ -26,6 +26,7 @@ jobs:
       image: docker.io/zmkfirmware/zmk-build-arm:3.5
     needs: compile-matrix
     strategy:
+      fail-fast: false
       matrix:
         include: ${{ fromJSON(needs.compile-matrix.outputs.include-list) }}
     steps:

.github/workflows/test.yml

@@ -31,6 +31,7 @@ jobs:
   run-tests:
     needs: collect-tests
     strategy:
+      fail-fast: false
       matrix:
         test: ${{ fromJSON(needs.collect-tests.outputs.test-dirs) }}
     runs-on: ubuntu-latest