correct refs in workflows

.gitea/workflows/zig-mach.yaml

@@ -1,10 +1,11 @@
 name: aws-zig mach nominated build
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 12 * * *' # noon UTC, 4AM Pacific
   push:
     branches:
-      - 'zig-mach*'
+      - 'zig-mach'
 env:
   PKG_PREFIX: nominated-zig
 jobs:
@@ -23,7 +24,7 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v4
         with:
-          ref: zig-develop
+          ref: zig-mach
       - name: Setup Zig
         uses: mlugg/setup-zig@v1.2.1
         with:

.gitea/workflows/zig-nightly.yaml

@@ -1,10 +1,11 @@
 name: aws-zig nightly build
 on:
+  workflow_dispatch:
   schedule:
     - cron: '30 12 * * *' # 12:30 UTC, 4:30AM Pacific
   push:
     branches:
-      - 'zig-develop*'
+      - 'zig-develop'
 env:
   PKG_PREFIX: nightly-zig
 jobs:

.gitea/workflows/zig-previous.yaml

@@ -16,6 +16,8 @@ jobs:
     steps:
       - name: Check out repository code
         uses: actions/checkout@v4
+        with:
+          ref: zig-0.13
       - name: Setup Zig
         uses: mlugg/setup-zig@v1.2.1
         with: