Disable fail-fast of GitHub Actions

This is default: true
https://help.github.com/en/articles/workflow-syntax-for-github-actions#jobsjob_idstrategyfail-fast

When `make check` fails, we do not want to cancel `make test-bundler`.

.github/workflows/macos.yml

@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         test_task: [ "check", "test-bundler", "test-bundled-gems" ]
+      fail-fast: false
     steps:
       - name: Disable Firewall
         run: |

.github/workflows/ubuntu.yml

@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         test_task: [ "test-bundler", "test-bundled-gems" ]
+      fail-fast: false
     steps:
       - name: Install libraries
         run: |

.github/workflows/windows.yml

@@ -18,6 +18,7 @@ jobs:
             vs: 2019
           - os: windows-2019
             vs: 2017
+      fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
       - name: Install libraries with vcpkg