More consistent git commit at end of every module

Author: mfisher87

modules/02-new-geospatial-tools/exercise.md

@@ -42,3 +42,11 @@ The Notebook contains everything you need to complete step 2 of this exercise.
    We'd be SO thrilled if you'd
    [open an experience report](https://github.com/geojupyter/jupytergis/issues/new/choose)
    to share your thoughts.
+
+
+## Step 4: Save our work to GitHub
+
+```bash
+git commit --all --message="Complete module 2"
+git push origin main
+```

modules/03-sharing-your-work/exercise.md

@@ -64,7 +64,7 @@ When you build your own MyST website, you can reproduce this with `myst init --s
 ### Step 5: Save to GitHub
 
 ```bash
-git commit --all --message="Display data in notebook"
+git commit --all --message="Complete module 3"
 git push origin main
 ```