CI: Apparently setup-beam requires this now

Otherwise it complains:
  Run erlef/setup-beam@v1
  Error: Tried to map a target OS from env. variable 'ImageOS'
    (got ubuntu24-arm64), but failed. If you're using a self-hosted runner,
    you should set 'env': 'ImageOS': ... to one of the following:
    ['ubuntu22', 'ubuntu24', 'win19', 'win22', 'win25', 'macos13',
     'macos14', 'macos15', 'macos26']

Author: badlop

.github/workflows/ci.yml

@@ -25,6 +25,8 @@ jobs:
 
   compile:
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['28']
@@ -73,6 +75,8 @@ jobs:
   static:
     needs: compile
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['28']
@@ -119,6 +123,8 @@ jobs:
   dynamic:
     needs: compile
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['28']
@@ -191,6 +197,8 @@ jobs:
   ct:
     needs: compile
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['28']
@@ -302,6 +310,8 @@ jobs:
   schema:
     needs: compile
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['28']

.github/workflows/weekly.yml

@@ -10,6 +10,8 @@ jobs:
 
   test:
     runs-on: ubuntu-24.04-arm
+    env:
+      ImageOS: ubuntu24
     strategy:
       matrix:
         otp: ['25', '26', '27', '28', '29']