ci: update bundler install path config

Author: steipete

.github/workflows/jazzy.yml

@@ -33,7 +33,7 @@ jobs:
             -v "$PWD:/workspace" \
             -w /workspace \
             norionomura/jazzy:0.13.3_swift-5.2.1 \
-            bash -lc "bundle install --path vendor/bundle && swift build && sourcekitten doc --spm-module InterposeKit > interposekit.json && bundle exec jazzy --clean --sourcekitten-sourcefile interposekit.json"
+            bash -lc "bundle config set path vendor/bundle && bundle install && swift build && sourcekitten doc --spm-module InterposeKit > interposekit.json && bundle exec jazzy --clean --sourcekitten-sourcefile interposekit.json"
       - name: Validate documentation coverage
         run: |
           if ruby -rjson -e "j = JSON.parse(File.read('docs/undocumented.json')); exit j['warnings'].length != 0"; then

.github/workflows/pod_lib_lint.yml

@@ -24,5 +24,5 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: bundle install --path vendor/bundle
+      - run: bundle config set path vendor/bundle && bundle install
       - run: bundle exec pod lib lint --verbose