Run irctest on Ubuntu 26.04 ARM.

.github/workflows/irctest.yml

@@ -17,14 +17,14 @@ on:
 jobs:
   check-skip:
     if: "!contains(github.event.head_commit.message, '[skip irctest ci]')"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     steps:
     - run: true  # Avoids skip check duplication.
 
   build-anope:
     needs:
     - check-skip
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     steps:
     - name: Checkout
       uses: actions/checkout@v7
@@ -59,7 +59,7 @@ jobs:
   build-inspircd:
     needs:
     - check-skip
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     steps:
     - name: Checkout
       uses: actions/checkout@v7
@@ -95,7 +95,7 @@ jobs:
   build-solanum:
     needs:
     - check-skip
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     steps:
     - name: Checkout
       uses: actions/checkout@v7
@@ -130,7 +130,7 @@ jobs:
   build-unrealircd:
     needs:
     - check-skip
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     steps:
     - name: Checkout
       uses: actions/checkout@v7
@@ -163,7 +163,7 @@ jobs:
         retention-days: 1
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04-arm
     needs:
     - build-anope
     - build-inspircd