Fill infrastructure and tooling section

Author: phil-opp

content/this-month/2024-06/index.md

@@ -43,6 +43,12 @@ Please follow this template:
 
 In this section, we collect recent updates to `rustc`, `cargo`, and other tooling that are relevant to Rust OS development.
 
+- [Split core's PanicInfo and std's PanicInfo](https://github.com/rust-lang/rust/pull/115974)
+- [Stabilize `PanicInfo::message()` and `PanicMessage`](https://github.com/rust-lang/rust/pull/126732)
+- [Unsafe extern blocks](https://github.com/rust-lang/rust/pull/124482)
+- [Size optimize int formatting](https://github.com/rust-lang/rust/pull/125606)
+- [Add `f16 inline ASM support for RISC-V](https://github.com/rust-lang/rust/pull/126530)
+
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     Please use the following template: