chore(release): bump version to 0.6.1

0.6.1 refinements release: A19 atomic config, S5 temp-WAV hardening, A15b slider
coalescing, A2 window-position clamp, A17 single-file recording I/O off the mixer
path, and a crate-wide cargo fmt. All wire-compatible (no *_PROTO change) with
0.6.0 peers -- no resync required.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Cargo.lock

@@ -4871,7 +4871,7 @@ checksum = "35fb2e5f958ec131621fdd531e9fc186ed768cbe395337403ae56c17a74c68ec"
 
 [[package]]
 name = "peerspeak"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "anyhow",
  "async-trait",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "peerspeak"
-version = "0.6.0"
+version = "0.6.1"
 edition = "2024"
 description = "Decentralized peer-to-peer voice chat (Rust/iroh/PipeWire/Opus/iced)"
 license = "MIT"