dev-bazel: Fix section title sequence

Building the documentation results in a warning from asciidoctor:

  WARNING: dev-bazel.txt.Documentation_htmlonly_macros: line 400:
  section title out of sequence: expected level 2, got level 3

Change-Id: I966a04b40ffd84a0804046315d2a086902f155a3

Documentation/dev-bazel.txt

diff --git a/Documentation/dev-bazel.txt b/Documentation/dev-bazel.txt
index 03d9f7d..f53c7db 100644
--- a/Documentation/dev-bazel.txt
+++ b/Documentation/dev-bazel.txt
@@ -397,7 +397,7 @@
 
 
 [[RBE]]
-==== Google Remote Build Support
+== Google Remote Build Support
 
 The Bazel build can be used with Google's Remote Build Execution.