refactor: Format files using Prettier

Actual command: `nix-shell --packages nodePackages.prettier --pure --run
'prettier --write .'`.

.github/dependabot.yml

@@ -1,11 +1,10 @@
 version: 2
 updates:
-
-- package-ecosystem: github-actions
+  - package-ecosystem: github-actions
     directory: "/"
     schedule:
       interval: daily
-    time: '00:00'
+      time: "00:00"
       timezone: UTC
     open-pull-requests-limit: 10
     commit-message:

action.yml

@@ -1,24 +1,24 @@
-name: 'Install Nix'
-description: 'Installs Nix on GitHub Actions for the supported platforms: Linux and macOS.'
-author: 'Domen Kožar'
+name: "Install Nix"
+description: "Installs Nix on GitHub Actions for the supported platforms: Linux and macOS."
+author: "Domen Kožar"
 inputs:
   extra_nix_config:
-    description: 'Gets appended to `/etc/nix/nix.conf` if passed.'
+    description: "Gets appended to `/etc/nix/nix.conf` if passed."
   github_access_token:
-    description: 'Configure nix to pull from github using the given github token.'
+    description: "Configure nix to pull from github using the given github token."
   install_url:
-    description: 'Installation URL that will contain a script to install Nix.'
+    description: "Installation URL that will contain a script to install Nix."
   install_options:
-    description: 'Additional installer flags passed to the installer script.'
+    description: "Additional installer flags passed to the installer script."
   nix_path:
-    description: 'Set NIX_PATH environment variable.'
+    description: "Set NIX_PATH environment variable."
 branding:
-  color: 'blue'
-  icon: 'sun'
+  color: "blue"
+  icon: "sun"
 runs:
-  using: 'composite'
+  using: "composite"
   steps:
-    - run : ${GITHUB_ACTION_PATH}/install-nix.sh
+    - run: ${GITHUB_ACTION_PATH}/install-nix.sh
       shell: bash
       env:
         INPUT_EXTRA_NIX_CONFIG: ${{ inputs.extra_nix_config }}