fix: replace "github.com/pkg/errors" with stdlib "errors" package

Signed-off-by: Justen Stall <39888103+justenstall@users.noreply.github.com>

pkg/action/validate.go

@@ -17,6 +17,7 @@ limitations under the License.
 package action
 
 import (
+	"errors"
 	"fmt"
 	"maps"
 

pkg/cmd/plugin.go

@@ -16,6 +16,7 @@ limitations under the License.
 package cmd
 
 import (
+	"fmt"
 	"io"
 
 	"github.com/spf13/cobra"

pkg/cmd/repo_list.go

@@ -17,6 +17,7 @@ limitations under the License.
 package cmd
 
 import (
+	"errors"
 	"fmt"
 	"io"