Update CodSpeed to v3 (#47)

Author: MarshalX

.github/workflows/codspeed.yml

@@ -48,7 +48,7 @@ jobs:
           RUSTFLAGS: "-Cprofile-use=${{ github.workspace }}/merged.profdata"
 
       - name: Run benchmarks.
-        uses: CodSpeedHQ/action@v2
+        uses: CodSpeedHQ/action@v3
         with:
           token: ${{ secrets.CODSPEED_TOKEN }}
           run: pytest . --codspeed -n auto