chore(release): v1.34.22 — fix truncated updater pubkey

A character was lost when the base64-encoded minisign public key was
transcribed into tauri.conf.json, producing a 41-byte decoded key
instead of the required 42 bytes. Every release built against that key
(v1.34.15 through v1.34.21) rejects any update manifest signature with
"Invalid encoding in minisign data". Replaced with the correct pubkey
read directly from ~/.tauri/psysonic-updater.key.pub.

v1.34.19 installed manually for testing cannot receive auto-updates
because the broken pubkey is baked into its binary; a fresh v1.34.22
install is required as the base for the updater test.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Psysonic",
-  "version": "1.34.21",
+  "version": "1.34.22",
   "identifier": "dev.psysonic.player",
   "build": {
     "beforeDevCommand": "npm run dev",
@@ -33,7 +33,7 @@
   },
   "plugins": {
     "updater": {
-      "pubkey": "dW50cnVzdGVkIGNvbW1lbnQ6IG1pbmlzaWduIHB1YmxpYyBrZXk6IDhCNzk5MUNCRDQ4N0UwODgKUldTSTRJZlV5NUY1aThucWM3RTh4ZmpwblR1amh4R2lER3NjZDgrQTQwVGNFaWFtVStsUWFjOQo=",
+      "pubkey": "dW50cnVzdGVkIGNvbW1lbnQ6IG1pbmlzaWduIHB1YmxpYyBrZXk6IDhCNzk5MUNCRDQ4N0UwODgKUldTSTRJZlV5NUY1aThucWM3RTh4ZmpwblR1amh4R2lER3NjZDgrQTQwVGNFaWFtVStsUVBhYzkK",
       "endpoints": [
         "https://github.com/Psychotoxical/psysonic/releases/latest/download/latest.json"
       ],