chore(release): satisfy knip for the release scripts

The release scripts spawn tar to read a packed tarball, and resolving a family
by id is the only entry point into the family list.

knip.json

@@ -9,6 +9,7 @@
     "musl-gcc",
     "python3",
     "sandbox-exec",
+    "tar",
     "taskkill",
     "where.exe"
   ],

scripts/release/families.ts

@@ -253,7 +253,7 @@ class VendorFamily extends ReleaseFamily {
 }
 
 /** Every release family this module owns, in workflow order. */
-export function releaseFamilies(): readonly ReleaseFamily[] {
+function releaseFamilies(): readonly ReleaseFamily[] {
   return [new DshFamily(), new VendorFamily()]
 }