WIP: fix: parameters for double space indent

[mihaigalos]

This PR fixes the syntax to achieve 2-spaced formatting - see #43.

[mihaigalos]

Seems this works:

 ---
 repos:
-    - repo: https://github.com/pre-commit/pre-commit-hooks
-      rev: v4.4.0
-      hooks:
-          - id: check-yaml
-          - id: trailing-whitespace
-    - repo: https://github.com/mihaigalos/pre-commit-hook-yamlfmt
-      rev: 0.2.3
-      hooks:
-          - id: yamlfmt
-            args: [--mapping, '4', --sequence, '4', --offset, '2', --colons, --width, '150']
-    - repo: https://github.com/mihaigalos/pre-commit-rust
-      rev: v1.0
-      hooks:
-          - id: cargo-check
-          - id: clippy
-          - id: fmt
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: check-yaml
+      - id: trailing-whitespace
+  - repo: https://github.com/mihaigalos/pre-commit-hook-yamlfmt
+    rev: 0.2.3
+    hooks:
+      - id: yamlfmt
+        args: [--mapping, '4', --sequence, '4', --offset, '2', --colons, --width, '150']
+  - repo: https://github.com/mihaigalos/pre-commit-rust
+    rev: v1.0
+    hooks:
+      - id: cargo-check
+      - id: clippy
+      - id: fmt

But formatting on GH Actions seems broken, still.