Fix quotations in tests

Author: joshmgross

.github/workflows/integration.yml

@@ -77,7 +77,7 @@ jobs:
 with:
 script: |
  const endpoint = github.request.endpoint
- return endpoint({url: \"/graphql\"}).headers.accept
+ return endpoint({url: "/graphql"}).headers.accept
 result-encoding: string
  - id: previews-set-single
 name: Previews set to a single value
@@ -86,7 +86,7 @@ jobs:
 previews: foo
 script: |
  const endpoint = github.request.endpoint
- return endpoint({url: \"/graphql\"}).headers.accept
+ return endpoint({url: "/graphql"}).headers.accept
 result-encoding: string
  - id: previews-set-multiple
 name: Previews set to comma-separated list
@@ -95,7 +95,7 @@ jobs:
 previews: foo,bar,baz
 script: |
  const endpoint = github.request.endpoint
- return endpoint({url: \"/graphql\"}).headers.accept
+ return endpoint({url: "/graphql"}).headers.accept
 result-encoding: string
  - run: |
  echo "- Validating previews default"