Fix typos found by codespell

lib/common/threading.c

@@ -47,7 +47,7 @@ static unsigned __stdcall worker(void *arg)
     void* (*start_routine)(void*);
     void* thread_arg;
 
-    /* Inialized thread_arg and start_routine and signal main thread that we don't need it
+    /* Initialized thread_arg and start_routine and signal main thread that we don't need it
      * to wait any longer.
      */
     {

lib/decompress/zstd_decompress_block.c

@@ -1987,7 +1987,7 @@ ZSTD_decompressSequencesLong(ZSTD_DCtx* dctx,
 
 
 /**
- * @returns The total size of the history referencable by zstd, including
+ * @returns The total size of the history referenceable by zstd, including
  * both the prefix and the extDict. At @p op any offset larger than this
  * is invalid.
  */

lib/zstd.h

@@ -2134,7 +2134,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
  * This parameter can be used to set an upper bound on the blocksize
  * that overrides the default ZSTD_BLOCKSIZE_MAX. It cannot be used to set upper
  * bounds greater than ZSTD_BLOCKSIZE_MAX or bounds lower than 1KB (will make
- * compressBound() innacurate). Only currently meant to be used for testing.
+ * compressBound() inaccurate). Only currently meant to be used for testing.
  *
  */
 #define ZSTD_c_maxBlockSize ZSTD_c_experimentalParam18