Pass HOME env var when fetching version (#2698)

Fixes #2662.

So, in a github action
https://github.com/mvukov/rules_ros2/blob/980afb82f4af92480815e723b47a0cde4bea63a7/.github/workflows/main.yml
I use my custom build image
https://github.com/mvukov/bazel_builder/blob/49178bdf9c151b1fdb1fb0bac580da5d53a990fd/Dockerfile,
no user defined. The github action passes user and HOME folder. The home
folder seems to be `/github/home` and fetching the version seems to have
problems with this. Therefore, I just pass the HOME env var here.

crate_universe/src/lockfile.rs

@@ -159,7 +159,11 @@ impl Digest {
     }
 
     pub(crate) fn bin_version(binary: &Path) -> Result<String> {
-        let safe_vars = [OsStr::new("HOMEDRIVE"), OsStr::new("PATHEXT")];
+        let safe_vars = [
+            OsStr::new("HOME"),
+            OsStr::new("HOMEDRIVE"),
+            OsStr::new("PATHEXT"),
+        ];
         let env = std::env::vars_os().filter(|(var, _)| safe_vars.contains(&var.as_os_str()));
 
         let output = Command::new(binary)