build(deps): bump github.com/open-policy-agent/opa from 1.8.0 to 1.9.0

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.8.0 to 1.9.0.
- [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/v1.8.0...v1.9.0)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/prometheus/procfs/proc_stat.go

@@ -101,6 +101,12 @@ type ProcStat struct {
 	RSS int
 	// Soft limit in bytes on the rss of the process.
 	RSSLimit uint64
+	// The address above which program text can run.
+	StartCode uint64
+	// The address below which program text can run.
+	EndCode uint64
+	// The address of the start (i.e., bottom) of the stack.
+	StartStack uint64
 	// CPU number last executed on.
 	Processor uint
 	// Real-time scheduling priority, a number in the range 1 to 99 for processes
@@ -177,9 +183,9 @@ func (p Proc) Stat() (ProcStat, error) {
 		&s.VSize,
 		&s.RSS,
 		&s.RSSLimit,
-		&ignoreUint64,
-		&ignoreUint64,
-		&ignoreUint64,
+		&s.StartCode,
+		&s.EndCode,
+		&s.StartStack,
 		&ignoreUint64,
 		&ignoreUint64,
 		&ignoreUint64,