Merge PR #5797 from @frack113 - ci: fix URL for sigma_schema_url

chore: fix URL for sigma_schema_url in validate.py
---------

Co-authored-by: Swachchhanda Shrawan Poudel <87493836+swachchhanda000@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>

Author: 3 people

.github/workflows/sigma-validation.yml

@@ -2,6 +2,9 @@ name: Validate Sigma rules
 
 on: [push, pull_request, merge_group, workflow_dispatch]
 
+env:
+  SIGMA_RULE_SCHEMA_VERSION: v2.1.0
+
 jobs:
   sigma-rules-validator:
     runs-on: ubuntu-latest
@@ -16,4 +19,4 @@ jobs:
             ./rules-emerging-threats
             ./rules-placeholder
             ./rules-threat-hunting
-          schemaFile: ${{ github.workspace }}/tests/validate-sigma-schema/sigma-schema.json
+          schemaURL: https://raw.githubusercontent.com/SigmaHQ/sigma-specification/refs/tags/${{ env.SIGMA_RULE_SCHEMA_VERSION }}/json-schema/sigma-detection-rule-schema.json

tests/validate-sigma-schema/sigma-schema.json

@@ -41,7 +41,7 @@ def get_envs() -> Dict[str, Any]:
     sigma_schema_file = os.environ.get("SIGMA_SCHEMA_FILE")
     sigma_schema_url = os.environ.get(
         "SIGMA_SCHEMA_URL",
-        "https://raw.githubusercontent.com/SigmaHQ/sigma-specification/main/sigma-schema.json",
+        "https://raw.githubusercontent.com/SigmaHQ/sigma-specification/refs/heads/main/json-schema/sigma-detection-rule-schema.json",
     )
 
     return {