chore(deps): Bump alpine from 3.20 to 3.22

Bumps alpine from 3.20 to 3.22.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: '3.22'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Dockerfile

@@ -21,7 +21,7 @@ RUN CGO_ENABLED=1 go build -ldflags '-w -s' \
     -o discord-voice-mcp ./cmd/discord-voice-mcp
 
 # Final stage
-FROM alpine:3.20
+FROM alpine:3.22
 
 # Install opus runtime library (required for dynamic linking)
 # hadolint ignore=DL3018

Dockerfile.whisper

@@ -20,7 +20,7 @@ RUN CGO_ENABLED=1 go build -ldflags '-w -s' \
     -o discord-voice-mcp ./cmd/discord-voice-mcp
 
 # Build stage for whisper.cpp  
-FROM alpine:3.20 AS whisper-builder
+FROM alpine:3.22 AS whisper-builder
 
 # Pin to a specific version for reproducible builds
 ARG WHISPER_CPP_VERSION=v1.7.3
@@ -40,7 +40,7 @@ RUN cmake -B build -DGGML_CCACHE=OFF . && \
     chmod +x build/bin/*
 
 # Final stage
-FROM alpine:3.20
+FROM alpine:3.22
 
 # Install runtime dependencies (including opus for dynamic linking)
 # hadolint ignore=DL3018