ci(pre-commit.ci): perform pre-commit autoupdate

updates:
- [github.com/rubocop-hq/rubocop: v1.30.1 → v1.31.1](rubocop/rubocop@v1.30.1...v1.31.1)
- [github.com/myint/rstcheck: 3f929574 → v6.0.0.post1](rstcheck/rstcheck@3f92957...v6.0.0.post1)

.pre-commit-config.yaml

@@ -30,7 +30,7 @@ repos:
         additional_dependencies: ['@commitlint/config-conventional@8.3.4']
         always_run: true
   - repo: https://github.com/rubocop-hq/rubocop
-    rev: v1.30.1
+    rev: v1.31.1
     hooks:
       - id: rubocop
         name: Check Ruby files with rubocop
@@ -59,7 +59,7 @@ repos:
         name: Check Salt files using salt-lint
         files: ^.*\.(sls|jinja|j2|tmpl|tst)$
   - repo: https://github.com/myint/rstcheck
-    rev: 3f929574
+    rev: v6.0.0.post1
     hooks:
       - id: rstcheck
         name: Check reST files using rstcheck