fix: remove deprecated/legacy comments, fix md lint error

Co-authored-by: radical <1472+radical@users.noreply.github.com>

Author: Copilot

.github/actions/check-changed-files/action.yml

@@ -9,7 +9,6 @@ description: |
   - patterns_file: Path to a file containing glob patterns (relative to repository root).
                    Lines starting with '#' and blank lines are ignored.
   - patterns: List of regex patterns (multiline string) to match against changed file paths.
-              Deprecated: prefer patterns_file.
 
   Pattern syntax for patterns_file:
   - **  matches any path including directory separators (recursive)
@@ -27,7 +26,7 @@ inputs:
     description: 'Path to a file containing glob patterns (relative to repository root)'
     required: false
   patterns:
-    description: 'List of regex patterns to match against changed files (deprecated: prefer patterns_file)'
+    description: 'List of regex patterns to match against changed files'
     required: false
 
 outputs:
@@ -110,7 +109,7 @@ runs:
             PATTERNS+=("$(glob_to_regex "$line")")
           done < "$FULL_PATH"
         elif [ -n "$PATTERNS_INPUT" ]; then
-          # Legacy: read raw regex patterns from the inline input
+          # Read raw regex patterns from the inline input
           while IFS= read -r pattern; do
             # Remove leading/trailing whitespace
             pattern=$(echo "$pattern" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')

docs/ci/ci-trigger-patterns.md

@@ -26,7 +26,7 @@ Lines starting with `#` and blank lines are ignored.
 
 ### Examples
 
-```
+```text
 # All Markdown files anywhere in the repo
 **.md