Revert "ci: allow riscv64-linux on Forgejo Actions to run on PRs for now"

This reverts commit 2cdafe9.

Author: alexrp

.forgejo/workflows/ci.yaml

@@ -52,7 +52,7 @@ jobs:
         run: sh ci/loongarch64-linux-release.sh
         timeout-minutes: 180
   riscv64-linux-debug:
-    # if: github.event_name != 'pull_request'
+    if: github.event_name != 'pull_request'
     runs-on: [self-hosted, riscv64-linux]
     steps:
       - name: Checkout
@@ -63,7 +63,7 @@ jobs:
         run: sh ci/riscv64-linux-debug.sh
         timeout-minutes: 540
   riscv64-linux-release:
-    # if: github.event_name != 'pull_request'
+    if: github.event_name != 'pull_request'
     runs-on: [self-hosted, riscv64-linux]
     steps:
       - name: Checkout