Doc: fix typo speficying > specifying

Change-Id: I8520bcf7a1e6300b53822082f8376113bd02713a
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

doc/src/editors/creator-editors.qdoc

@@ -1259,7 +1259,7 @@
     To always use spaces for alignment, select \gui {With Spaces}. To follow the
     \gui {Tab policy}, select \gui {With Regular Indent}.
 
-    \section2 Speficying Typing Options
+    \section2 Specifying Typing Options
 
     When you type text or code, it is indented automatically according to the selected
     text editor or code style options. Specify typing options in the