Fix typos with codespell

Using codespell 2.0.0.

Method:
```
$ cat > ../godot-word-whitelist.txt << EOF
ang
curvelinear
dof
doubleclick
fave
findn
GIRD
leapyear
lod
merchantibility
nd
numer
ois
ony
que
seeked
synching
te
uint
unselect
webp
EOF

$ codespell -w -q 3 -I ../godot-word-whitelist.txt --skip="./thirdparty,*.po"
$ git diff // undo unwanted changes
```

misc/dist/html/service-worker.js

@@ -1,6 +1,6 @@
 // This service worker is required to expose an exported Godot project as a
 // Progressive Web App. It provides an offline fallback page telling the user
-// that they need an Internet conneciton to run the project if desired.
+// that they need an Internet connection to run the project if desired.
 // Incrementing CACHE_VERSION will kick off the install event and force
 // previously cached resources to be updated from the network.
 const CACHE_VERSION = "@GODOT_VERSION@";