Update zig tree-sitter (#1501)

use latest upstream version
move comptime from @keyword.function to @keyword.directive
use AssignOp
enhance indents

helix-syntax/languages/tree-sitter-zig

@@ -1 +1 @@
-Subproject commit 1f27fd1dfe7f352408f01b4894c7825f3a1d6c47
+Subproject commit 93331b8bd8b4ebee2b575490b2758f16ad4e9f30

runtime/queries/zig/highlights.scm

@@ -144,7 +144,6 @@ field_constant: (IDENTIFIER) @constant
 
 ; VarDecl
 [
-  "comptime"
   "threadlocal"
   "fn"
 ] @keyword.function
@@ -178,6 +177,7 @@ field_constant: (IDENTIFIER) @constant
 
 ; PrecProc
 [
+  "comptime"
   "inline"
   "noinline"
   "asm"
@@ -195,15 +195,14 @@ field_constant: (IDENTIFIER) @constant
   (BitwiseOp)
   (BitShiftOp)
   (AdditionOp)
+  (AssignOp)
   (MultiplyOp)
   (PrefixOp)
   "*"
   "**"
   "->"
-  "=>"
   ".?"
   ".*"
-  "="
   "?"
 ] @operator
 

runtime/queries/zig/indents.toml

@@ -3,6 +3,9 @@ indent = [
  "BlockExpr",
  "ContainerDecl",
  "SwitchExpr",
+ "AssignExpr",
+ "ErrorUnionExpr",
+ "Statement",
  "InitList"
 ]