fix(release): limit release git commit message to 32k

This fixes "spawn E2BIG" errors with VERY long commit messages, which
can happen with the first release after enabling semantic-release.

We should consider whether it's possible to merge multiple dependency
updates into one line, since in our situation that's the source of many
redundant lines in the changelog.

release.config.js

@@ -19,7 +19,7 @@ module.exports = {
             '@semantic-release/git',
             {
                 // eslint-disable-next-line no-template-curly-in-string
-                message: 'chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}'
+                message: 'chore(release): ${nextRelease.version} [skip ci]\n\n${(nextRelease.notes.length < 32000) ? nextRelease.notes : (nextRelease.notes.slice(0,32000) + "...\\n\\n(Notes too long. Truncated.)")}'
             }
         ],
         [