fix: fix repoContrib confusion (#2269) (#2274)

This commit prevents confusion about the Contributed to stat. Currently,
only the last year's results are shown, but it looks like it is the
all-time contribution count (see #2269). This commit adds a ' (last year)'
suffix to prevent this confusion from happening.

tests/renderStatsCard.test.js

@@ -344,7 +344,7 @@ describe("Test renderStatsCard", () => {
       document.querySelector(
         'g[transform="translate(0, 100)"]>.stagger>.stat.bold',
       ).textContent,
-    ).toMatchInlineSnapshot(`"参与项目数:"`);
+    ).toMatchInlineSnapshot(`"参与项目数 (last year):"`);
   });
 
   it("should render without rounding", () => {