chore(internal/config): update config docs with current commands (#2960)

Author: noahdietz

internal/config/config.go

@@ -91,8 +91,7 @@ type Config struct {
 	// When this is not specified, the googleapis repository is cloned
 	// automatically.
 	//
-	// APISource is used by generate, update-apis and configure
-	// commands.
+	// APISource is used by generate and update-image commands.
 	//
 	// APISource is specified with the -api-source flag.
 	APISource string
@@ -148,8 +147,8 @@ type Config struct {
 	// GitHubToken is the access token to use for all operations involving
 	// GitHub.
 	//
-	// GitHubToken is used by to configure, update-apis and update-image-tag commands,
-	// when Push is true.
+	// GitHubToken is used by the generate, update-image, and release
+	// init commands when Push is true.
 	//
 	// GitHubToken is not specified by a flag, as flags are logged and the
 	// access token is sensitive information. Instead, it is fetched from the
@@ -207,7 +206,7 @@ type Config struct {
 
 	// Push determines whether to push changes to GitHub. It is used in
 	// all commands that create commits in a language repository:
-	// configure and update-apis.
+	// generate, release init, update-image.
 	// These commands all create pull requests if they
 	//
 	// By default (when Push isn't explicitly specified), commits are created in
@@ -228,7 +227,7 @@ type Config struct {
 	// Librarian-created changes with other changes.
 	//
 	// Repo is used by all commands which operate on a language repository:
-	// configure, generate, update-apis.
+	// generate, release init, update-image.
 	//
 	// When a local directory is specified for the generate command, the repo is checked to
 	// determine whether the specified API path is configured as a library. See the generate