chore: align advertised Rust version with egui requirements

CONTRIBUTING.md

@@ -12,7 +12,7 @@ needed most.
 
 ## Get it running (about 10 minutes on a fast machine)
 
-You need stable Rust 1.90 or newer. For the web
+You need stable Rust 1.95 or newer (required by egui/eframe 0.36). For the web
 build you also need `rustup target add wasm32-unknown-unknown` and [`trunk`](https://trunkrs.dev).
 
 ```sh

Cargo.toml

@@ -8,7 +8,7 @@ exclude = ["vendor"]
 version = "0.2.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
-rust-version = "1.90"
+rust-version = "1.95"
 authors = ["SolveCraft contributors"]
 repository = "https://github.com/bherbruck/solvecraft"
 

docs/book/src/guide/getting-started.md

@@ -4,7 +4,7 @@
 
 Download the latest build from the
 [releases page](https://github.com/bherbruck/solvecraft/releases), or build it yourself with
-stable Rust (1.90 or newer):
+stable Rust (1.95 or newer):
 
 ```sh
 git clone https://github.com/bherbruck/solvecraft && cd solvecraft