qtrvsim/fibo-hazards: add notice that la use is problematic

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtrvsim/fibo-hazards/fibo-hazards-template.S

@@ -32,8 +32,9 @@
 
 _start:
 
-	la   a0, fibo_series
-	la   a1, fibo_limit
+	la   a0, fibo_series // la is pseudoinstruction expanded
+	la   a1, fibo_limit  // into two instructions with dependency
+	                     // look for replacements in seminaries
 	lw   a1, 0(a1) // number of elements in the array
 
 //Insert your code there