Add staging URL to release process

RELEASE.md

@@ -1,20 +1,20 @@
 # Release Process
 
 1. Test the main branch using the [edgeandnode/local-network-environments](https://github.com/edgeandnode/local-network-environments) (`theodus/bash-time` branch)
-    - Make sure that the gateway returns a correct response to a valid query
-    - Run any other ad-hoc tests that are appropriate for the set of changes made since the last release
+   - Make sure that the gateway returns a correct response to a valid query
+   - Run any other ad-hoc tests that are appropriate for the set of changes made since the last release
 2. Open a PR for the new release on [edgeandnode/local-network-environments](https://github.com/edgeandnode/local-network-environments)
-    - Version the release based on [SemVer](https://semver.org/)
-      - Note that the data science team relies on the logging format, so any changes to existing log events, spans, or fields require a major version bump
-    - Set the new version in `Cargo.toml`
-    - Include release notes for changes since the last release
-    - Rebase & Merge the PR
-    - Create a new release via GitHub
-      - Include the release notes from the PR
-      - Tag the commit with the version string, prefixed with a `v`
+   - Version the release based on [SemVer](https://semver.org/)
+     - Note that the data science team relies on the logging format, so any changes to existing log events, spans, or fields require a major version bump
+   - Set the new version in `Cargo.toml`
+   - Include release notes for changes since the last release
+   - Rebase & Merge the PR
+   - Create a new release via GitHub
+     - Include the release notes from the PR
+     - Tag the commit with the version string, prefixed with a `v`
 3. Open a PR on [edgeandnode/graph-network-infra](https://github.com/edgeandnode/graph-network-infra)
-    - Update the staging (and testnet?) gateways to the new version
-    - Update environment variables and Prometheus filters as necessary
-4. TODO: test against staging/testnet gateways...
+   - Update the staging (and testnet?) gateways to the new version
+   - Update environment variables and Prometheus filters as necessary
+4. Query the staging gateway at `https://gateway.staging.network.thegraph.com`
 5. Open a PR on [edgeandnode/graph-network-infra](https://github.com/edgeandnode/graph-network-infra)
-    - Update the mainnet gateway configs, making the same configuration changes as in step 3
+   - Update the mainnet gateway configs, making the same configuration changes as in step 3