chore: fix buildpack integration tests (#173)

* Fix buildpack integration tests

* Use sudo to fix write permissions

Author: garethgeorge

.github/workflows/buildpack-integration-test.yml

@@ -11,7 +11,7 @@ permissions: read-all
 
 jobs:
   ruby30-buildpack-test:
-    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/buildpack-integration-test.yml@v1.8.0
+    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/buildpack-integration-test.yml@v1.8.1
     with:
       http-builder-source: 'test/conformance'
       http-builder-target: 'http_func'

test/conformance/prerun.sh

@@ -23,5 +23,5 @@ cat Gemfile
 sudo gem install bundler
 
 # Generate a Gemfile.lock without installing any Gems
-bundle lock --update
-cat Gemfile.lock
+sudo bundle lock --update
+cat Gemfile.lock