fix(deps): bump alpine from 3.19.1 to 3.20.2

Bumps alpine from 3.19.1 to 3.20.2.

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

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -7,7 +7,7 @@ RUN apk add --no-cache git && \
     go mod download && \
     CGO_ENABLED=0 go build -ldflags="-s -w" -o "webdav-server"
 
-FROM alpine:3.19.1
+FROM alpine:3.20.2
 
 WORKDIR /