SECURITY.md updated to Eclipse's policy, rust toolchain update

[ladatz]

Resolves #281

Motivation and Context

For legacy reasons the repository had Microsoft's security policy listed. We need to update it to reflect Eclipse Foundation's policy.

Description

• Use Eclipse foundations' security policy in SECURITY.md
• Update rust toolchain version to 1.72.1

[github-actions]

Intent Brokering Benchmark

Benchmark suite	Current: 475ae57	Previous: 3229a85	Ratio
CPU Usage	77 Percent (p95=79)	44 Percent (p95=46)	1.75
Memory Usage	2040 Bytes (p95=2724)	2674 Bytes (p95=3084)	0.76
Invoke Throughput	3030 1/Second	3030 1/Second	1
Latency	4 Millisecond (p95=13)	2 Millisecond (p95=7)	2
Definitely Lost Bytes	0 bytes	0 bytes	-∞
Definitely Lost Blocks	0 blocks	0 blocks	-∞
Indirectly Lost Bytes	0 bytes	0 bytes	-∞
Indirectly Lost Blocks	0 blocks	0 blocks	-∞
Possibly Lost Bytes	2620 bytes	2620 bytes	1
Possibly Lost Blocks	8 blocks	8 blocks	1

This comment was automatically generated by workflow using github-action-benchmark.

[ashbeitz]

A few suggestions. Please take a look.

[fprezado]

thanks for the comments and review @ashbeitz. wWe will follow the template that Eclipse Foundation recommends in their handbook and make the update based on it. This is a useful reference for how to customize the template - https://blogs.eclipse.org/post/marta-rybczynska/securitymd-should-i-have-it