upgrade asottile/workflows

Committed via https://github.com/asottile/all-repos

.github/workflows/main.yml

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6f5511c..118cdc9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,12 +8,12 @@
 
 jobs:
   main-windows:
-    uses: asottile/workflows/.github/workflows/tox.yml@v1.7.0
+    uses: asottile/workflows/.github/workflows/tox.yml@v1.8.1
     with:
       env: '["py39"]'
       os: windows-latest
   main-linux:
-    uses: asottile/workflows/.github/workflows/tox.yml@v1.7.0
+    uses: asottile/workflows/.github/workflows/tox.yml@v1.8.1
     with:
       env: '["py39", "py310", "py311", "py312"]'
       os: ubuntu-latest