Fix typo (hetzneronline#838)

.github/scripts-metadata/check-meta-files.sh

@@ -9,7 +9,7 @@ updated_variables=".github/scripts-metadata/updated-variables.txt"
 echo $markdown_file
 
 # Extract YAML front matter from Markdown file and turn it into a JSON file
-metadata=$(awk '/^---$/{f=!f;next}f' "$markdown_file" | yq eval -o=json - > "$output_file")
+metadata=$(head -n 20 "$markdown_file" | awk '/^---$/{f=!f;next}f' | yq eval -o=json - > "$output_file")
 
 # Validate metadata against the JSON schema
 npx ajv-cli validate -s "$json_schema" -d "$output_file" --all-errors --errors=line > "$validate_file" 2>&1
@@ -27,6 +27,6 @@ done
 # Replace the original variable messages with error messages
 awk -F'=' 'NR==FNR{a[$1]=$2; next} {if($1 in a) {$2=a[$1]} print}' OFS='=' "$new_variables" "$variables" > "$updated_variables"
 
-# Update formatting to make it work for `source` and `envsubst` in `.guthub/workflows/check-metadata-in-files.yml`
+# Update formatting to make it work for `source` and `envsubst` in `.github/workflows/check-metadata-in-files.yml`
 sed -i -e 's/SPDX-License-Identifier/license/g' -e "s/^\(.*\)=\(.*\)$/\\1='\2'/g" -e 's/^/export /' "$updated_variables"
 echo "$updated_variables"