fix(alpine): declare xz-dev so R can start after a clean install

libR.so links against liblzma, but the Alpine package never declared a
dependency on it. The list carried `# - liblzma-dev`, the Debian name,
which does not exist on Alpine and so had been commented out rather than
translated. The result is a package that installs cleanly and then fails
on every invocation:

  Error loading shared library liblzma.so.5: No such file or directory
    (needed by /opt/R/4.6.1/lib/R/lib/libR.so)
  Error relocating /opt/R/4.6.1/lib/R/lib/libR.so: lzma_code: symbol not found

Replace it with xz-dev, the Alpine equivalent, which pulls xz-libs, the
package that owns liblzma.so.5. Keep the -dev variant to match every other
entry in the list, which are -dev so that CRAN packages can be installed
from source on the target.

Verified by repackaging the currently published r-4.6.1_1_aarch64.apk with
this dependency list and installing it into a clean alpine:3.22 container:
R now starts with no manually added packages, where before it did not.

builder/package.alpine-322

@@ -42,7 +42,10 @@ ${deflate_libs}
 # - libgomp1
 - icu-dev
 - jpeg-dev
-# - liblzma-dev
+# liblzma-dev is the Debian name and does not exist on Alpine; xz-dev is the
+# equivalent and pulls xz-libs, which owns liblzma.so.5. Without it libR.so
+# cannot relocate its lzma symbols and R fails to start at all.
+- xz-dev
 - openblas-dev
 - pango
 # - libpangocairo-1.0-0