docs: Update documentation for 0.4.0 release (#1096)

* update TPC-H results

* update Maven links

* update benchmarking guide and add TPC-DS results

* include q72

README.md

@@ -46,7 +46,7 @@ The following chart shows the time it takes to run the 22 TPC-H queries against
 using a single executor with 8 cores. See the [Comet Benchmarking Guide](https://datafusion.apache.org/comet/contributor-guide/benchmarking.html)
 for details of the environment used for these benchmarks.
 
-When using Comet, the overall run time is reduced from 616 seconds to 374 seconds, a 1.6x speedup, with query 1
+When using Comet, the overall run time is reduced from 615 seconds to 364 seconds, a 1.7x speedup, with query 1
 running 9x faster than Spark.
 
 Running the same queries with DataFusion standalone (without Spark) using the same number of cores results in a 3.6x 
@@ -55,21 +55,21 @@ speedup compared to Spark.
 Comet is not yet achieving full DataFusion speeds in all cases, but with future work we aim to provide a 2x-4x speedup 
 for a broader set of queries.
 
-![](docs/source/_static/images/benchmark-results/0.3.0/tpch_allqueries.png)
+![](docs/source/_static/images/benchmark-results/0.4.0/tpch_allqueries.png)
 
 Here is a breakdown showing relative performance of Spark, Comet, and DataFusion for each TPC-H query.
 
-![](docs/source/_static/images/benchmark-results/0.3.0/tpch_queries_compare.png)
+![](docs/source/_static/images/benchmark-results/0.4.0/tpch_queries_compare.png)
 
 The following charts shows how much Comet currently accelerates each query from the benchmark.
 
 ### Relative speedup
 
-![](docs/source/_static/images/benchmark-results/0.3.0/tpch_queries_speedup_rel.png)
+![](docs/source/_static/images/benchmark-results/0.4.0/tpch_queries_speedup_rel.png)
 
 ### Absolute speedup
 
-![](docs/source/_static/images/benchmark-results/0.3.0/tpch_queries_speedup_abs.png)
+![](docs/source/_static/images/benchmark-results/0.4.0/tpch_queries_speedup_abs.png)
 
 These benchmarks can be reproduced in any environment using the documentation in the 
 [Comet Benchmarking Guide](https://datafusion.apache.org/comet/contributor-guide/benchmarking.html). We encourage