Add community evaluation results for GPQA, MMLU-PRO

This PR adds community-provided evaluation results for the following benchmarks:

- **[GPQA](https://huggingface.co/datasets/Idavidrein/gpqa)**
- **[MMLU-PRO](https://huggingface.co/datasets/TIGER-Lab/MMLU-Pro)**

These results were extracted from the model card. This is based on the new [evaluation results feature](https://huggingface.co/docs/hub/eval-results).

*Note: This is an automated PR. Please review the evaluation results before merging.*

.eval_results/gpqa.yaml

@@ -0,0 +1,7 @@
+- dataset:
+    id: Idavidrein/gpqa
+    task_id: diamond
+  value: 71
+  source:
+    url: https://huggingface.co/Zyphra/ZAYA1-8B
+    name: Model Card

.eval_results/mmlu-pro.yaml

@@ -0,0 +1,7 @@
+- dataset:
+    id: TIGER-Lab/MMLU-Pro
+    task_id: mmlu_pro
+  value: 74.2
+  source:
+    url: https://huggingface.co/Zyphra/ZAYA1-8B
+    name: Model Card