Fix EXPLAINME.adoc section heading quotes

Strip unnecessary double quotes from AsciiDoc section headings for proper
rendering and cross-reference generation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

EXPLAINME.adoc

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: PMPL-1.0-or-later
 = git-reticulator -- EXPLAINME
 
-== "Semantic lattice builder for git repositories in AffineScript"
+== Semantic lattice builder for git repositories in AffineScript
 
 [quote, Cargo.toml]
 ____