fix: revert unintended commit

Author: lulf

rust-toolchain.toml

@@ -1,8 +1,12 @@
 # Before upgrading check that everything is available on all tier1 targets here:
 # https://rust-lang.github.io/rustup-components-history
 [toolchain]
-channel = "nightly-2025-02-17"
-components = [ "rust-src", "rustfmt" ]
+channel = "1.85"
+components = [ "rust-src", "rustfmt", "llvm-tools-preview" ]
 targets = [
-    "thumbv7em-none-eabi"
+    "thumbv8m.main-none-eabihf",
+    "thumbv7em-none-eabi",
+    "thumbv7em-none-eabihf",
+    "thumbv6m-none-eabi",
+    "riscv32imc-unknown-none-elf",
 ]