Use macos-15-intel instead of unstable macos-26-intel in {jit,tail-call}.yml

This partially reverts 4240c7d.

Author: StanFromIreland

.github/actionlint.yaml

@@ -1,8 +1,3 @@
-self-hosted-runner:
-  # Pending release of actionlint > 1.7.11 for macos-26-intel support
-  # https://github.com/rhysd/actionlint/pull/629
-  labels: ["macos-26-intel"]
-
 config-variables: null
 
 paths:

.github/workflows/jit.yml

@@ -99,9 +99,9 @@ jobs:
           - false
         include:
           - target: x86_64-apple-darwin/clang
-            runner: macos-26-intel
+            runner: macos-15-intel
           - target: aarch64-apple-darwin/clang
-            runner: macos-26
+            runner: macos-15
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:

.github/workflows/tail-call.yml

@@ -32,9 +32,9 @@ jobs:
       matrix:
         include:
           - target: x86_64-apple-darwin/clang
-            runner: macos-26-intel
+            runner: macos-15-intel
           - target: aarch64-apple-darwin/clang
-            runner: macos-26
+            runner: macos-15
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with: