meta: add marco-ippolito to security release stewards

[marco-ippolito]

I'd like to join the security release stewards

Fixes: nodejs/TSC#1764

[mcollina]

lgtm

[richardlau]

Actually we have a process for this:

node/doc/contributing/security-release-process.md

Lines 11 to 17 in 6a3b545

	For each security release, a security steward will take ownership for
	coordinating the steps outlined in this process. Security stewards
	are nominated through an issue in the TSC repository and approved
	through the regular TSC consensus process. Once approved, they
	are given access to all of the resources needed to carry out the
	steps listed in the process as outlined in
	[security steward on/off boarding](security-steward-on-off-boarding.md).

[marco-ippolito]

Actually we have a process for this:

node/doc/contributing/security-release-process.md

Lines 11 to 17 in 6a3b545

	For each security release, a security steward will take ownership for
	coordinating the steps outlined in this process. Security stewards
	are nominated through an issue in the TSC repository and approved
	through the regular TSC consensus process. Once approved, they
	are given access to all of the resources needed to carry out the
	steps listed in the process as outlined in
	[security steward on/off boarding](security-steward-on-off-boarding.md).

Oh I couldnt find this. Is it possible to self nominate?

[marco-ippolito]

Opened an issue in the TSC repo nodejs/TSC#1764 for good measure