rename systab -> merge

.github/workflows/merge-perf.yaml

@@ -1,4 +1,4 @@
-name: Systab Benchmarks
+name: Merge Benchmarks
 on:
   repository_dispatch:
     types: [ benchmark-merge ]
@@ -80,10 +80,10 @@ jobs:
         summaryq="select avg(latency) as avg from ${{ env.RESULT_TABLE_NAME }}"
 
         out="$gw/results.csv"
-        dolt_dir="$gw/systab-perf"
+        dolt_dir="$gw/merge-perf"
 
-        dolt config --global --add user.email "systab-perf@dolthub.com"
-        dolt config --global --add user.name "systab-perf"
+        dolt config --global --add user.email "merge-perf@dolthub.com"
+        dolt config --global --add user.name "merge-perf"
 
         echo '${{ secrets.DOLTHUB_IMPORT_PERF_CREDS_VALUE }}' | dolt creds import
         dolt clone ${{ env.DOLTHUB_DB }} "$dolt_dir"
@@ -180,8 +180,8 @@ jobs:
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         issue: ${{ github.event.client_payload.issue_id }}
-        message-failure: systab benchmark failed
-        message-cancelled: systab benchmark cancelled
+        message-failure: merge benchmark failed
+        message-cancelled: merge benchmark cancelled
         allow-repeats: true
         message: |
           @${{ github.event.client_payload.actor }} __DOLT__