Fix Typos in pub_stats.hpp and prng.h (#423)

* fix typos pub_stats.hpp

* typo fix prng.h

Author: Hack666r

Diff for: pc/pub_stats.hpp

@@ -12,7 +12,7 @@ namespace pc
 
     pub_stats();
 
-    // number of prices submited
+    // number of prices submitted
     uint64_t get_num_sent() const;
 
     // number of observed aggregate slot updates

Diff for: program/c/src/oracle/util/prng.h

@@ -307,7 +307,7 @@ static inline double prng_double_o ( prng_t * prng ) { return prng_uint64_to_dou
 
    Rejection method based.  Specifically, the number of prng slots
    consumed is typically 1 but theoretically might be higher
-   occassionally (64-bit wide types consume prng slots twice as fast).
+   occasionally (64-bit wide types consume prng slots twice as fast).
 
    Deterministic prng slot consumption possible with a slightly more
    approximate implementation (bound the number of iterations such that