Reduce fuzzing to monthly (#1715)

Since the project isn't seeing much active developed and results have
been stable for a while now, I feel like these don't have to fuzzed
daily anymore - mostly motivated by reducing resource usage.

.github/workflows/fuzz-bash.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "0 2 * * *"
+    - cron: "0 2 1 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-cmd.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "5 2 * * *"
+    - cron: "0 2 2 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-csh.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "10 2 * * *"
+    - cron: "0 2 3 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-dash.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "15 2 * * *"
+    - cron: "0 2 4 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-no-shell-unix.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "25 2 * * *"
+    - cron: "0 2 5 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-no-shell-win.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "35 2 * * *"
+    - cron: "0 2 6 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-powershell.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "20 2 * * *"
+    - cron: "0 2 7 * *"
   workflow_dispatch: ~
 
 permissions: read-all

.github/workflows/fuzz-zsh.yml

@@ -15,7 +15,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "30 2 * * *"
+    - cron: "0 2 8 * *"
   workflow_dispatch: ~
 
 permissions: read-all