doc: update my (Isaac's) email address

 doc/river.1.scd     | 2 +-
 doc/riverctl.1.scd  | 2 +-
 doc/rivertile.1.scd | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/river.1.scd b/doc/river.1.scd
index a49add8..8ddd09f 100644
--- a/doc/river.1.scd
+++ b/doc/river.1.scd
@@ -69,7 +69,7 @@ Set the keyboard layout to colemak:
 
 # AUTHORS
 
-Maintained by Isaac Freund <[email protected]> who is assisted by open
+Maintained by Isaac Freund <[email protected]> who is assisted by open
 source contributors. For more information about river's development, see
 <https://github.com/ifreund/river>.
 
diff --git a/doc/riverctl.1.scd b/doc/riverctl.1.scd
index 31874bf..49fdd34 100644
--- a/doc/riverctl.1.scd
+++ b/doc/riverctl.1.scd
@@ -359,7 +359,7 @@ See also the example init script at /etc/river/init.
 
 # AUTHORS
 
-Maintained by Isaac Freund <[email protected]> who is assisted by open
+Maintained by Isaac Freund <[email protected]> who is assisted by open
 source contributors. For more information about river's development, see
 <https://github.com/ifreund/river>.
 
diff --git a/doc/rivertile.1.scd b/doc/rivertile.1.scd
index 4b77a02..7ac1722 100644
--- a/doc/rivertile.1.scd
+++ b/doc/rivertile.1.scd
@@ -78,7 +78,7 @@ Set the main count to 3 at runtime:
 
 # AUTHORS
 
-Maintained by Isaac Freund <[email protected]> who is assisted by open
+Maintained by Isaac Freund <[email protected]> who is assisted by open
 source contributors. For more information about river's development, see
 <https://github.com/ifreund/river>.