Upgrade latest Rust to 1.80

Author: eaufavor

.github/workflows/build.yml

@@ -6,7 +6,7 @@ jobs:
   pingora:
     strategy:
       matrix:
-        toolchain: [nightly, 1.72, 1.79]
+        toolchain: [nightly, 1.72, 1.80.0]
     runs-on: ubuntu-latest
     # Only run on "pull_request" event for external PRs. This is to avoid
     # duplicate builds for PRs created from internal branches.