Set the packageManager correctly from goreleaser

Ensure that we are settings the package manager correctly.

I'll follow up with some tests for this in the BDD branch.

.goreleaser.yml

@@ -30,4 +30,4 @@ builds:
       # -w Omit the DWARF symbol table.
       # These are the defaults specified by goreleaser:
       # https://github.com/goreleaser/goreleaser/blob/682c811106f56ffe06c4212de546aec62161fb9d/internal/builders/golang/build.go#L46
-      - -s -w -X github.com/CircleCI-Public/circleci-cli/version.Version={{.Version}} -X github.com/CircleCI-Public/circleci-cli/version.Commit={{.ShortCommit}} -X github.com/CircleCI-Public/circleci-cli/cmd.PackageManager=release
+      - -s -w -X github.com/CircleCI-Public/circleci-cli/version.Version={{.Version}} -X github.com/CircleCI-Public/circleci-cli/version.Commit={{.ShortCommit}} -X github.com/CircleCI-Public/circleci-cli/version.packageManager=release

version/version.go

@@ -29,7 +29,7 @@ func PackageManager() string {
 
 // UserAgent returns the user agent that should be user for external requests
 func UserAgent() string {
-	return fmt.Sprintf("circleci-cli/%s+%s (%s)", Version, Commit, packageManager)
+	return fmt.Sprintf("circleci-cli/%s+%s (%s)", Version, Commit, PackageManager())
 }
 
 func runningInsideSnap() bool {