Bump github.com/go-git/go-git/v5 from 5.11.0 to 5.12.0

Bumps [github.com/go-git/go-git/v5](https://github.com/go-git/go-git) from 5.11.0 to 5.12.0.
- [Release notes](https://github.com/go-git/go-git/releases)
- [Commits](https://github.com/go-git/go-git/compare/v5.11.0...v5.12.0)

---
updated-dependencies:
- dependency-name: github.com/go-git/go-git/v5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/x448.go

@@ -73,7 +73,9 @@ func (c *x448) GenerateECDH(rand io.Reader) (point []byte, secret []byte, err er
 func (c *x448) Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error) {
 	var pk, ss x448lib.Key
 	seed, e, err := c.generateKeyPairBytes(rand)
-
+	if err != nil {
+		return nil, nil, err
+	}
 	copy(pk[:], point)
 	x448lib.Shared(&ss, &seed, &pk)