Use "main" branch for stable github actions

Author: JamyGolden

.github/workflows/auto-assign-issues.yml

@@ -6,6 +6,6 @@ on:
 
 jobs:
   auto-assign:
-    uses: "tinted-theming/home/.github/workflows/shared-auto-assign-issues.yml@stable-actions"
+    uses: "tinted-theming/home/.github/workflows/shared-auto-assign-issues.yml@main"
     secrets:
       token: ${{ secrets.BOT_ACCESS_TOKEN }}

.github/workflows/update.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   build-and-commit:
-    uses: "tinted-theming/home/.github/workflows/shared-build-template-and-commit-themes.yml@stable-actions"
+    uses: "tinted-theming/home/.github/workflows/shared-build-template-and-commit-themes.yml@main"
     secrets:
       token: ${{ secrets.BOT_ACCESS_TOKEN }}
     with: