Removing concurrency from github action

Signed-off-by: Adam Farley <adfarley@redhat.com>

.github/workflows/function-lib-checker.yml

@@ -13,6 +13,7 @@
 
 # If a PR includes a change to any lib file, we run the function library tests.
 
+----
 name: Build Function Library Checker
 on:
   pull_request:
@@ -23,14 +24,18 @@ on:
 env:
   TEST_SCRIPT: "lib/tests/functionLibraryTests.sh"
 
+# Cancel existing runs if user makes another push.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
 jobs:
   libtests:
     permissions:
       contents: read
-      issues: write 
     runs-on: ubuntu-latest
     name: Run Build Function Library Tests
     if: ${{ (github.repository == 'adoptium/temurin-build') || (github.event_name == 'workflow_dispatch') }}