Update build-oas script for building exceptions template changes (#396)

## Problem



## Solution

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or other resources.

## Type of Change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [ ] Non-code change (docs, etc)
- [ ] None of the above: (explain here)

## Test Plan

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Author: ssmith-pc

codegen/build-oas.sh

@@ -83,7 +83,7 @@ generate_client() {
 	docker run --rm -v $(pwd):/workspace openapitools/openapi-generator-cli:v5.2.0 generate \
 		--input-spec "/workspace/$oas_file" \
 		--generator-name python \
-		--additional-properties=packageName=$package_name,pythonAttrNoneIfUnset=true \
+		--additional-properties=packageName=$package_name,pythonAttrNoneIfUnset=true,exceptionsPackageName=pinecone.core.openapi.shared.exceptions \
 		--output "/workspace/${build_dir}" \
 		--template-dir "/workspace/$template_dir"