fix(oauth-providers): github oauth (#1372)

* fix github email request 400 code

* fix github email request 400 code

* add change set

* ci: apply automated fixes

* fix change set and format

* ci: apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: mrdear

.changeset/gentle-bugs-peel.md

@@ -0,0 +1,5 @@
+---
+'@hono/oauth-providers': patch
+---
+
+fixed github email request content-type

packages/oauth-providers/src/providers/github/authFlow.ts

@@ -99,6 +99,8 @@ export class AuthFlow {
       headers: {
         Authorization: `Bearer ${this.token?.token}`,
         'User-Agent': userAgent,
+        Accept: 'application/json',
+        'Content-Type': 'application/json',
       },
     }).then((res) => res.json())) as GitHubEmailResponse[] | GitHubErrorResponse