Bump version to 1.2.1

Patch release shipping the hardened-runtime microphone fix
(device.audio-input + allow-jit entitlements). The previously released
1.2.0 build could not access the microphone once hardened-runtime signed.

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

macos/WhisperDictate.app/Contents/Info.plist

@@ -19,9 +19,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.2.0</string>
+	<string>1.2.1</string>
 	<key>CFBundleVersion</key>
-	<string>1</string>
+	<string>2</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>13.0</string>
 	<key>LSUIElement</key>