ci: update to actions/checkout@v4

Also update to ludeeus/[email protected]

Author: marmitar

.github/workflows/installer-sync.yml

@@ -10,7 +10,7 @@ jobs:
   installer-sync:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Check nanorc included every *nanorc files
         run: |

.github/workflows/shellcheck.yml

@@ -10,22 +10,20 @@ jobs:
   shellcheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: ShellCheck
-        uses: ludeeus/action-shellcheck@1.1.0
+        uses: ludeeus/action-shellcheck@2.0.0
         #with:
           # A space separated list of additional filename to check
-          #additional_files: # optional, default is 
+          #additional_files: # optional, default is ''
           # Paths to ignore when running ShellCheck
-          #ignore: # optional, default is 
+          #ignore_paths: # optional, default is ''
           # Minimum severity of errors to consider. Options: [error, warning, info, style]
-          #severity: # optional, default is 
+          #severity: # optional, default is ''
           # Run shellcheck on _all_ files at once, instead of one at a time
-          #check_together: # optional, default is 
+          #check_together: # optional, default is ''
           # Directory to be searched for files. Defaults to .
           #scandir: # optional, default is .
-          # Set to true to skip using problem-matcher
-          #disable_matcher: # optional, default is false
           # Output format (checkstyle, diff, gcc, json, json1, quiet, tty)
           #format: # optional, default is gcc