fix filenames

Author: Midnighter

.github/workflows/main.yml renamed to .github/workflows/main.yaml

@@ -12,4 +12,4 @@ on:
 
 jobs:
   tests:
-    uses: ./.github/workflows/tests.yml
+    uses: ./.github/workflows/tests.yaml

.github/workflows/release.yaml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   tests:
-    uses: ./.github/workflows/tests.yml
+    uses: ./.github/workflows/tests.yaml
 
   release:
     needs: tests