update CompileBot, add precompile statements for nightly

Author: t-bltg

.github/workflows/CompileBot.yml renamed to .github/workflows/SnoopCompile.yml

@@ -1,4 +1,6 @@
-name: CompileBot
+# NOTE: this file should be named 'SnoopCompile.yml', cf github.com/aminya/CompileBot.jl/blob/master/src/CompileBot.jl#L57
+
+name: SnoopCompile
 
 on:
   push: