[exec.affine.on, task.promise] Fix typos

Author: Andreas-Krug

source/exec.tex

@@ -6938,7 +6938,7 @@
 \begin{codeblock}
 transform_sender(@\exposid{get-domain-early}@(sndr), @\exposid{make-sender}@(affine_on, sch, sndr))
 \end{codeblock}
-except that \tcode{sndr} is evalutated only once.
+except that \tcode{sndr} is evaluated only once.
 
 \pnum
 The exposition-only class template \exposid{impls-for}
@@ -7513,7 +7513,7 @@
 \tcode{\exposid{RCVR}(\placeholder{prom})},
 and \tcode{\exposid{SCHED}(\placeholder{prom})}
 associated with \tcode{\placeholder{tsk}}
-during evalutation of \tcode{task::\exposid{state}<Rcvr>::start}
+during evaluation of \tcode{task::\exposid{state}<Rcvr>::start}
 for some receiver \tcode{Rcvr}.
 
 \pnum