Update go-git to v5.18.0 to remediate GHSA-3xc5-wrhm-f963 (#735)

Bumped github.com/go-git/go-git/v5 from v5.17.1 to v5.18.0 to address
security advisory GHSA-3xc5-wrhm-f963 affecting the console image.

Changes:
- go.mod: Updated go-git dependency to v5.18.0
- go.sum: Updated checksums for new version

Verified: Build and basic validation passed

Co-authored-by: Michael Guarino <mjg@plural.sh>

Author: plural-copilot[bot]

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/briandowns/spinner v1.23.2
 	github.com/chartmuseum/helm-push v0.11.1
 	github.com/fatih/color v1.18.0
-	github.com/go-git/go-git/v5 v5.17.1
+	github.com/go-git/go-git/v5 v5.18.0
 	github.com/gofrs/flock v0.13.0
 	github.com/google/go-containerregistry v0.20.3
 	github.com/google/go-github/v45 v45.2.0

go.sum

@@ -346,8 +346,8 @@ github.com/go-git/go-billy/v5 v5.8.0 h1:I8hjc3LbBlXTtVuFNJuwYuMiHvQJDq1AT6u4DwDz
 github.com/go-git/go-billy/v5 v5.8.0/go.mod h1:RpvI/rw4Vr5QA+Z60c6d6LXH0rYJo0uD5SqfmrrheCY=
 github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMje31YglSBqCdIqdhKBW8lokaMrL3uTkpGYlE2OOT4=
 github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
-github.com/go-git/go-git/v5 v5.17.1 h1:WnljyxIzSj9BRRUlnmAU35ohDsjRK0EKmL0evDqi5Jk=
-github.com/go-git/go-git/v5 v5.17.1/go.mod h1:pW/VmeqkanRFqR6AljLcs7EA7FbZaN5MQqO7oZADXpo=
+github.com/go-git/go-git/v5 v5.18.0 h1:O831KI+0PR51hM2kep6T8k+w0/LIAD490gvqMCvL5hM=
+github.com/go-git/go-git/v5 v5.18.0/go.mod h1:pW/VmeqkanRFqR6AljLcs7EA7FbZaN5MQqO7oZADXpo=
 github.com/go-gorp/gorp/v3 v3.1.0 h1:ItKF/Vbuj31dmV4jxA1qblpSwkl9g1typ24xoe70IGs=
 github.com/go-gorp/gorp/v3 v3.1.0/go.mod h1:dLEjIyyRNiXvNZ8PSmzpt1GsWAUK8kjVhEpjH8TixEw=
 github.com/go-jose/go-jose/v4 v4.1.4 h1:moDMcTHmvE6Groj34emNPLs/qtYXRVcd6S7NHbHz3kA=