build(deps): bump github.com/open-policy-agent/opa from 1.1.0 to 1.2.0

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/open-policy-agent/opa/internal/bundle/utils.go

@@ -6,6 +6,7 @@ package bundle
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -97,7 +98,7 @@ func LoadBundleFromDiskForRegoVersion(regoVersion ast.RegoVersion, path, name st
 
 	_, err := os.Stat(bundlePath)
 	if err == nil {
-		f, err := os.Open(filepath.Join(bundlePath))
+		f, err := os.Open(bundlePath)
 		if err != nil {
 			return nil, err
 		}
@@ -132,7 +133,7 @@ func SaveBundleToDisk(path string, raw io.Reader) (string, error) {
 	}
 
 	if raw == nil {
-		return "", fmt.Errorf("no raw bundle bytes to persist to disk")
+		return "", errors.New("no raw bundle bytes to persist to disk")
 	}
 
 	dest, err := os.CreateTemp(path, ".bundle.tar.gz.*.tmp")