commiter_date: fix github api request fallback

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

__mocks__/@actions/github.ts

@@ -205,5 +205,19 @@ export const context = {
 };
 
 export const getOctokit = jest.fn(() => ({
-  request: () => Promise.resolve({data: {committer: {date: '2024-11-13T13:42:28Z'}}})
+  rest: {
+    repos: {
+      getCommit: jest.fn(() =>
+        Promise.resolve({
+          data: {
+            commit: {
+              committer: {
+                date: '2024-11-13T13:42:28Z'
+              }
+            }
+          }
+        })
+      )
+    }
+  }
 }));