ci: align xlings version with project toolchain

Author: helantianshen

.github/workflows/ci-linux.yml

@@ -25,7 +25,7 @@ env:
   # Pinned rather than "newest": a bootstrap that floats turns an upstream
   # release into a red build on an unrelated PR. Floor is xlings 0.4.69
   # (the index keys by (namespace, name) from there on) — never pin below it.
-  XLINGS_VERSION: v2026.7.28.4
+  XLINGS_VERSION: v2026.8.11.2
   XLINGS_NON_INTERACTIVE: '1'
 
 jobs:

.github/workflows/ci-macos.yml

@@ -19,7 +19,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  XLINGS_VERSION: v2026.7.28.4
+  XLINGS_VERSION: v2026.8.11.2
   XLINGS_NON_INTERACTIVE: '1'
 
 jobs:

.github/workflows/ci-windows.yml

@@ -22,7 +22,7 @@ concurrency:
 env:
   # Both installers read this: the shell one takes it as an argument or an env
   # var, the PowerShell one defaults its -Version parameter to it.
-  XLINGS_VERSION: v2026.7.28.4
+  XLINGS_VERSION: v2026.8.11.2
   XLINGS_NON_INTERACTIVE: '1'
 
 jobs: