Bump rubocop and standard in /backend

Bumps [rubocop](https://github.com/rubocop/rubocop) and [standard](https://github.com/standardrb/standard). These dependencies needed to be updated together.

Updates `rubocop` from 1.57.2 to 1.60.2
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.57.2...v1.60.2)

Updates `standard` from 1.32.1 to 1.34.0
- [Release notes](https://github.com/standardrb/standard/releases)
- [Changelog](https://github.com/standardrb/standard/blob/main/CHANGELOG.md)
- [Commits](standardrb/standard@v1.32.1...v1.34.0)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: standard
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

backend/Gemfile.lock

@@ -281,8 +281,8 @@ GEM
     paper_trail (15.1.0)
       activerecord (>= 6.1)
       request_store (~> 1.4)
-    parallel (1.23.0)
-    parser (3.2.2.4)
+    parallel (1.24.0)
+    parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
     pg (1.5.4)
@@ -343,7 +343,7 @@ GEM
       redis-client (>= 0.17.0)
     redis-client (0.19.1)
       connection_pool
-    regexp_parser (2.8.3)
+    regexp_parser (2.9.0)
     request_store (1.5.1)
       rack (>= 1.4)
     responders (3.1.1)
@@ -374,22 +374,22 @@ GEM
       rspec-mocks (~> 3.12)
       rspec-support (~> 3.12)
     rspec-support (3.12.1)
-    rubocop (1.57.2)
+    rubocop (1.60.2)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.4)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
-    rubocop-performance (1.19.1)
-      rubocop (>= 1.7.0, < 2.0)
-      rubocop-ast (>= 0.4.0)
+    rubocop-performance (1.20.2)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
     ruby-progressbar (1.13.0)
     ruby-vips (2.2.0)
       ffi (~> 1.12)
@@ -426,18 +426,18 @@ GEM
       hashie
       version_gem (~> 1.1, >= 1.1.1)
     ssrf_filter (1.1.2)
-    standard (1.32.1)
+    standard (1.34.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.57.2)
+      rubocop (~> 1.60)
       standard-custom (~> 1.0.0)
-      standard-performance (~> 1.2)
+      standard-performance (~> 1.3)
     standard-custom (1.0.2)
       lint_roller (~> 1.0)
       rubocop (~> 1.50)
-    standard-performance (1.2.1)
+    standard-performance (1.3.1)
       lint_roller (~> 1.1)
-      rubocop-performance (~> 1.19.1)
+      rubocop-performance (~> 1.20.2)
     standardrb (1.0.1)
       standard
     state_machines (0.6.0)