Add missing license comments in go.mod (#4938)

## Summary
- Add license comments for 7 direct dependencies that were missing them
(`charmbracelet/huh`, `golang.org/x/{exp,mod,oauth2,sync,sys,text}`)

This pull request was AI-assisted by Isaac.

Author: pietern

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/Masterminds/semver/v3 v3.4.0 // MIT
 	github.com/charmbracelet/bubbles v1.0.0 // MIT
 	github.com/charmbracelet/bubbletea v1.3.10 // MIT
-	github.com/charmbracelet/huh v1.0.0
+	github.com/charmbracelet/huh v1.0.0 // MIT
 	github.com/charmbracelet/lipgloss v1.1.0 // MIT
 	github.com/databricks/databricks-sdk-go v0.126.0 // Apache 2.0
 	github.com/fatih/color v1.19.0 // MIT
@@ -36,12 +36,12 @@ require (
 	github.com/tailscale/hujson v0.0.0-20250605163823-992244df8c5a // BSD-3-Clause
 	go.yaml.in/yaml/v3 v3.0.4 // MIT, Apache 2.0
 	golang.org/x/crypto v0.49.0 // BSD-3-Clause
-	golang.org/x/exp v0.0.0-20260112195511-716be5621a96
-	golang.org/x/mod v0.34.0
-	golang.org/x/oauth2 v0.36.0
-	golang.org/x/sync v0.20.0
-	golang.org/x/sys v0.43.0
-	golang.org/x/text v0.35.0
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // BSD-3-Clause
+	golang.org/x/mod v0.34.0 // BSD-3-Clause
+	golang.org/x/oauth2 v0.36.0 // BSD-3-Clause
+	golang.org/x/sync v0.20.0 // BSD-3-Clause
+	golang.org/x/sys v0.43.0 // BSD-3-Clause
+	golang.org/x/text v0.35.0 // BSD-3-Clause
 	gopkg.in/ini.v1 v1.67.1 // Apache 2.0
 )