Fix metrics flag

Author: nHackel

.github/workflows/Semgrep.yml

@@ -48,7 +48,7 @@ jobs:
         run: | 
             semgrep scan \
                 --config ./JuliaRules/rules \
-                --metrics = off \
+                --metrics=off \
                 --sarif --output report.sarif \
                 --oss-only \
                 --exclude=JuliaRules