fix(deps): update dependency org.apache.maven:maven-plugin-api to v3.…

…9.6 (#3645)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.apache.maven:maven-plugin-api](https://maven.apache.org/) |
`3.6.3` -> `3.9.6` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.apache.maven:maven-plugin-api/3.9.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.apache.maven:maven-plugin-api/3.9.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.apache.maven:maven-plugin-api/3.6.3/3.9.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.apache.maven:maven-plugin-api/3.6.3/3.9.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am on the first day of the
month" (UTC), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/slsa-framework/slsa-github-generator).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zNjMuNSIsInVwZGF0ZWRJblZlciI6IjM3LjM2My41IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Signed-off-by: Mend Renovate <bot@renovateapp.com>

actions/maven/publish/slsa-hashing-plugin/pom.xml

@@ -20,7 +20,7 @@
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-plugin-api</artifactId>
-            <version>3.6.3</version>
+            <version>3.9.6</version>
         </dependency>
         <dependency>
             <groupId>org.apache.maven.plugin-tools</groupId>