Fix wrong color pick in README.

README.md

@@ -14,7 +14,7 @@ app_file: app.py
 pinned: false
 emoji: 🚊
 colorFrom: red
-colorTo: white
+colorTo: gray
 ---
 
 # Metric Card for TRAM Accuracy

tram_accuracy.py

@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""TODO: Add a description here."""
+"""Metric to calculate the accuracy for the TRAM benchmark by Wang et al. (2024)."""
 
 import re
 import evaluate