Fix heading level of 'Try' section

It was agreed to be '## Try:' but there were many files where it was
'### Try:'. This has been corrected.

1996/august/README.md

@@ -31,7 +31,7 @@ very short amount of time, then you may need to fix your compiler or use gcc.
 The above should print a `!` followed by a newline.
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

1996/dalbec/README.md

@@ -12,7 +12,7 @@ make all
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./dalbec 3 | head -n 29

1996/eldby/README.md

@@ -20,7 +20,7 @@ To quit send intr (typically ctrl-c).
 NOTE: to reset the sanity of your terminal after this program ends try `reset`.
 
 
-### Try:
+## Try:
 
 This alternate version, which we recommend that you use in order to see what is
 happening with modern systems, and to not flash too quickly, which can be

1996/gandalf/README.md

@@ -23,7 +23,7 @@ For more detailed information see [1996 gandalf in bugs.md](/bugs.md#1996-gandal
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

1996/huffman/README.md

@@ -23,7 +23,7 @@ echo 'Huffman Decoding' | ./huffman
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

1996/jonth/README.md

@@ -47,7 +47,7 @@ That's not a bug, that's a feature.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./jonth host1:0 host2:0

1996/rcm/README.md

@@ -12,7 +12,7 @@ make all
 ```
 
 
-### Try:
+## Try:
 
 For more information try:
 

1996/schweikh1/README.md

@@ -12,7 +12,7 @@ make all
 ```
 
 
-### Try:
+## Try:
 
 To find the day that Easter falls on in the current year:
 

1996/schweikh2/README.md

@@ -22,7 +22,7 @@ The program accepts up to 4 parameters:
 3. The goal value or 0/0 [default: 42]
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

1996/westley/README.md

@@ -18,7 +18,7 @@ alt version.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh