docs: Fix some typos in the developer notes

Found when double-checking my review on Brian's series.

Signed-off-by: Thomas Helland <thomashelland90@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
diff --git a/docs/devinfo.html b/docs/devinfo.html
index eb3aba1..0da18b9 100644
--- a/docs/devinfo.html
+++ b/docs/devinfo.html
@@ -564,7 +564,7 @@
 tarballs" in the previous step. Commit this change.
 </p>
 
-<h3>Push all commits and the tag creates above</h3>
+<h3>Push all commits and the tag created above</h3>
 
 <p>
 This is the first step that cannot easily be undone. The release is going
@@ -591,7 +591,7 @@
 	mv ~/MesaLib-X.Y.Z* .
 </pre>
 
-<h3>Back on mesa master, andd the new release notes into the tree</h3>
+<h3>Back on mesa master, add the new release notes into the tree</h3>
 
 <p>
 Something like the following steps will do the trick: