Change workflows for Katie's departure (#1242)

* Update create-release workflow: katie -> george
* Update gdocs workflow: katie -> george
* Update release-helper workflow: katie -> george

Author: krivard

.github/workflows/create-release.yml

@@ -39,7 +39,7 @@ jobs:
           base: main
           title: Release Delphi Epidata ${{ steps.version.outputs.next_tag }}
           labels: chore
-          reviewers: krivard
-          assignees: krivard
+          reviewers: melange396
+          assignees: melange396
           body: |
             Releasing Delphi Epidata ${{ steps.version.outputs.next_tag }}.

.github/workflows/release-helper.yml

@@ -147,7 +147,7 @@ jobs:
           base: dev
           title: "chore: sync main->dev"
           labels: chore
-          reviewers: krivard
-          assignees: krivard
+          reviewers: melange396
+          assignees: melange396
           body: |
             Syncing Main->Dev.

.github/workflows/update_gdocs_data.yml

@@ -31,7 +31,7 @@ jobs:
           commit-message: 'chore: update docs'
           title: Update Google Docs Meta Data
           labels: chore
-          reviewers: krivard
-          assignees: krivard
+          reviewers: melange396
+          assignees: melange396
           body: |
             Updating Google Docs Meta Data