Fix typos in the terminals section of doc/Language/unicode_entry.pod6

Author: Kaiepi

doc/Language/unicode_entry.pod6

@@ -112,8 +112,8 @@ of unicode to program in Perl 6:
     XTerm*locale:             UTF-8
     XTerm*titleModes:         16
     XTerm*useClipping:        false
-    XTerm*utf8                1
-    XTerm*utf8Fonts           1
+    XTerm*utf8:               1
+    XTerm*utf8Fonts:          1
     XTerm*utf8Title:          true
     =end code
 
@@ -126,7 +126,7 @@ configuration that supports displaying enough of unicode to program in Perl 6:
     =begin code :lang<.Xdefaults>
     URxvt*font:              xft:Noto Mono:pixelsize=14:style=Regular,\
                              xft:Noto Emoji:pixelsize=14:style=Regular
-    URxvt*letterspace:       -1
+    URxvt*letterSpace:       -1
     URxvt*locale:            en_US.UTF-8
     URxvt*skipBuiltInGlyphs: true
     =end code