Fix people who use gh instead of env vars (#41418)

Conrad Irwin created 

Closes #ISSUE

Release Notes:

- N/A

Change summary

script/get-preview-channel-changes      | 2 +-
script/get-stable-channel-release-notes | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

Detailed changes

script/get-preview-channel-changes 🔗 

@@ -1,7 +1,7 @@
 #!/usr/bin/env node --redirect-warnings=/dev/null
 
 const { execFileSync } = require("child_process");
-const { GITHUB_ACCESS_TOKEN } = process.env;
+let { GITHUB_ACCESS_TOKEN } = process.env;
 const GITHUB_URL = "https://github.com";
 const SKIPPABLE_NOTE_REGEX = /^\s*-?\s*n\/?a\s*/ims;
 const PULL_REQUEST_WEB_URL = "https://github.com/zed-industries/zed/pull";

script/get-stable-channel-release-notes 🔗 

@@ -13,7 +13,7 @@
 // stable that didn't make it into a release, as they were cherry picked
 
 const { execFileSync } = require("child_process");
-const { GITHUB_ACCESS_TOKEN } = process.env;
+let { GITHUB_ACCESS_TOKEN } = process.env;
 const GITHUB_TAGS_API_URL = "https://api.github.com/repos/zed-industries/zed/releases/tags";
 const DIVIDER = "-".repeat(80);