Properly disable m_data rule

For stylistic reasons, `# ` as a prefix describes a comment which may be
rendered as a heading or body of a description for a rule,
whereas a bare `#` is used to comment out a rule.

.github/actions/spelling/line_forbidden.patterns

@@ -1,7 +1,7 @@
 # reject `m_data` as VxWorks defined it and that breaks things if it's used elsewhere
 # see [fprime](https://github.com/nasa/fprime/commit/d589f0a25c59ea9a800d851ea84c2f5df02fb529)
 # and [Qt](https://github.com/qtproject/qt-solutions/blame/fb7bc42bfcc578ff3fa3b9ca21a41e96eb37c1c7/qtscriptclassic/src/qscriptbuffer_p.h#L46)
-# \bm_data\b
+#\bm_data\b
 
 # If you have a framework that uses `it()` for testing and `fit()` for debugging a specific test,
 # you might not want to check in code where you were debugging w/ `fit()`.