deps(dev-npm): bump release-please in /dev-dependencies (#5193)

Bumps [release-please](https://github.com/googleapis/release-please) from 16.7.0 to 16.8.0.
- [Release notes](https://github.com/googleapis/release-please/releases)
- [Changelog](https://github.com/googleapis/release-please/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/release-please/compare/v16.7.0...v16.8.0)

---
updated-dependencies:
- dependency-name: release-please
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dev-dependencies/package-lock.json

@@ -11,7 +11,7 @@
       "dependencies": {
         "@commitlint/cli": "^18.6.0",
         "@commitlint/config-conventional": "^18.6.0",
-        "release-please": "^16.7.0"
+        "release-please": "^16.8.0"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -2375,9 +2375,9 @@
       }
     },
     "node_modules/release-please": {
-      "version": "16.7.0",
-      "resolved": "https://registry.npmjs.org/release-please/-/release-please-16.7.0.tgz",
-      "integrity": "sha512-RDUYioBuYTF67QuryqOhlPNDYhMcv2gacMsgkz7ObYhnJUwNU17ffCsbbaMOpsm0G6Qpk9xekQHMw8CNIlnDvg==",
+      "version": "16.8.0",
+      "resolved": "https://registry.npmjs.org/release-please/-/release-please-16.8.0.tgz",
+      "integrity": "sha512-ixSHUDMbuAG8CmIrg7obz7pDlvMJzvLTYwvHjIfBBR4gRV42/RsMEAiSJvRQnqsw/ntYdDlHuwTGARr1AOaGjg==",
       "dependencies": {
         "@conventional-commits/parser": "^0.4.1",
         "@google-automations/git-file-utils": "^2.0.0",

dev-dependencies/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@commitlint/cli": "^18.6.0",
     "@commitlint/config-conventional": "^18.6.0",
-    "release-please": "^16.7.0"
+    "release-please": "^16.8.0"
   },
   "license": "MIT"
 }