Recursive submodule init fails on sky130_fd_io's submodule latest/third_party/make-env

[robtaylor]

Expected Behavior

% git submodule update --init --recursive
%

Actual Behavior

% git submodule update --init --recursive

Cloning into '/Users/robtaylor/Code/Chipflow/skywater-pdk/libraries/sky130_fd_io/latest/third_party/make-env'...
robtaylor@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git+ssh://github.com/SymbiFlow/make-env.git' into submodule path '/Users/robtaylor/Code/Chipflow/skywater-pdk/libraries/sky130_fd_io/latest/third_party/make-env' failed
Failed to clone 'third_party/make-env'. Retry scheduled

Steps to Reproduce the Problem

1. check out skywater-pdk head
2. git submodule update --init --recursive

Specifications

• Version: 01b18699b4102d8e54ad1406b3991ecb652e5aee
• Platform: OS X Big Sur

Fix

I can't PR the fix as the issue lies in https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_fd_io.git, but it's simple -

diff --git a/.gitmodules b/.gitmodules
index 3abb82d..41a62bf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "third_party/make-env"]
        path = third_party/make-env
-       url = git+ssh://github.com/SymbiFlow/make-env.git
+       url = https://github.com/SymbiFlow/make-env.git