doc: update tracking issues of startup performance

The issues listed in the doc have been closed, and a new one is
currently being used to track snapshot integration.

PR-URL: nodejs#40629
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/guides/strategic-initiatives.md

@@ -11,7 +11,7 @@ agenda to ensure they are active and have the support they need.
 | Core Promise APIs         | [Antoine du Hamel][aduh95]  | <https://github.com/nodejs/TSC/issues/1094>                                                  |
 | Future of Build Toolchain | [Mary Marchini][mmarchini]  | <https://github.com/nodejs/TSC/issues/901>, <https://github.com/nodejs/build-toolchain-next> |
 | QUIC / HTTP3              | [James M Snell][jasnell]    | <https://github.com/nodejs/quic>                                                             |
-| Startup performance       | [Joyee Cheung][joyeecheung] | <https://github.com/nodejs/node/issues/17058> <https://github.com/nodejs/node/issues/21563>  |
+| Startup performance       | [Joyee Cheung][joyeecheung] | <https://github.com/nodejs/node/issues/35711>                                                |
 | V8 Currency               | [Michaël Zasso][targos]     |                                                                                              |
 
 <details>