chore: pin GitHub Actions to commit SHAs

.github/SECURITY.md

@@ -1,13 +0,0 @@
-# Security Policy
-
-**PLEASE DON'T DISCLOSE SECURITY-RELATED ISSUES PUBLICLY, [SEE BELOW](#reporting-a-vulnerability).**
-
-## Reporting a Vulnerability
-
-If you discover a security vulnerability in Pest, please report it privately using one of the following channels:
-
-1. **GitHub Private Vulnerability Reporting** (preferred) — go to the repository's **Security** tab and click **"Report a vulnerability"**. This creates a private advisory visible only to maintainers and provides a structured workflow for triage, fix coordination, and CVE assignment.
-
-2. **Email** — send the details to Nuno Maduro at **enunomaduro@gmail.com**.
-
-All security vulnerabilities will be promptly addressed.

.github/dependabot.yml

@@ -1,19 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    groups:
-      github-actions:
-        patterns:
-          - "*"
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    target-branch: "5.x"
-    groups:
-      github-actions:
-        patterns:
-          - "*"