Fix some typos

ci-tools/update-nixpkgs

@@ -206,7 +206,7 @@ create_merge_request() {
     # The target branch of the MR.
     local TARGET_BRANCH=$1
     shift
-    # THe source branch of the MR.
+    # The source branch of the MR.
     local SOURCE_BRANCH=$1
     shift
     local DIFF=$1

ci-tools/with-ssh-agent

@@ -5,7 +5,7 @@
 # it.  ssh-agent itself does most of that work for us so the main benefit of
 # the script is that it guarantees ssh-agent is available for us to run.
 
-# Just give ssh-agent the commmand and it will runn it and then exit when it
+# Just give ssh-agent the commmand and it will run it and then exit when it
 # does.  This is a nice way to do process management so as to avoid leaking
 # ssh-agents.  Just in case cleanup fails for some reason, we'll also give
 # keys a lifetime with `-t <seconds>` so secrets don't say in memory