Spelling fixes

dev/device-ids.rst

@@ -117,7 +117,7 @@ possibilities here;
 Once we have and address and port a TCP connection is established and a
 TLS handshake performed. As part of the handshake both devices present
 their certificates. Once the handshake has completed and the peer
-certificiate is known, the following steps are performed.
+certificate is known, the following steps are performed.
 
 1. Calculate the remote device ID by using the process above on the
    received certificate.

dev/release-schedule.rst

@@ -25,7 +25,7 @@ downgrade to 0.7.x might be trickier.
 Patch Releases
 --------------
 
-A new patch release is made each sunday, if there have been changes
+A new patch release is made each Sunday, if there have been changes
 committed since the last release. Serious bugs, such as would crash the
 client or corrupt data, cause an immediate (out of schedule) patch
 release.

dev/rest.rst

@@ -2,7 +2,7 @@ REST API
 ========
 
 Syncthing exposes a REST interface over HTTP on the GUI port. This is
-used by the GUI code (Javascript) and can be used by other processes
+used by the GUI code (JavaScript) and can be used by other processes
 wishing to control Syncthing. In most cases both the input and output
 data is in JSON format. The interface is subject to change.