CI: bundler: Remove deprecated command

.github/workflows/build_rpi3.yml

@@ -39,7 +39,8 @@ jobs:
     - name: Set up Ruby
       run: |
         gem install bundler
-        bundle install --retry 3 --without uart
+        bundle config set without 'uart'
+        bundle install --retry 3
     - name: Make
       run: |
         BSP=rpi3 bundle exec ruby utils/devtool.rb make

.github/workflows/build_rpi4.yml

@@ -39,7 +39,8 @@ jobs:
     - name: Set up Ruby
       run: |
         gem install bundler
-        bundle install --retry 3 --without uart
+        bundle config set without 'uart'
+        bundle install --retry 3
     - name: Make
       run: |
         BSP=rpi4 bundle exec ruby utils/devtool.rb make

.github/workflows/sanity.yml

@@ -28,7 +28,8 @@ jobs:
     - name: Set up Ruby
       run: |
         gem install bundler
-        bundle install --retry 3 --without uart
+        bundle config set without 'uart'
+        bundle install --retry 3
     - name: Setup misspell
       run: |
         curl -L -o ./install-misspell.sh https://git.io/misspell

.github/workflows/test_integration.yml

@@ -39,7 +39,8 @@ jobs:
     - name: Set up Ruby
       run: |
         gem install bundler
-        bundle install --retry 3 --without uart
+        bundle config set without 'uart'
+        bundle install --retry 3
     - name: Make all
       run: |
         bundle exec ruby utils/devtool.rb test_integration

.github/workflows/test_unit.yml

@@ -39,7 +39,8 @@ jobs:
     - name: Set up Ruby
       run: |
         gem install bundler
-        bundle install --retry 3 --without uart
+        bundle config set without 'uart'
+        bundle install --retry 3
     - name: Make all
       run: |
         bundle exec ruby utils/devtool.rb test_unit