go.talks/goforc.slide: fix typos

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6782087
diff --git a/2012/goforc.slide b/2012/goforc.slide
index b480767..14ce425 100644
--- a/2012/goforc.slide
+++ b/2012/goforc.slide
@@ -385,7 +385,7 @@
 
 Two compilers: gc, gccgo
 
-Support for multiple platforms: x86 (32/64bit), ARM (32/64), Linux, BSD, OS X, ...
+Support for multiple platforms: x86 (32/64bit), ARM (32bit), Linux, BSD, OS X, ...
 
 Automatic formatting of source code: `gofmt`
 
@@ -451,7 +451,7 @@
 - a mechanism to interact with them (_Methods_),
 - and support for polymorphism (_Interfaces_).
 
-Claim: Data abstraction, enscapsulation, and modularity are mechanisms
+Claim: Data abstraction, encapsulation, and modularity are mechanisms
 in their own right, not OOP specific, and a modern language (OO or not)
 should have support for them independently.