fix typo in read me and add links in index

solidity/codeql/docs/docs/Detectors/index.md

@@ -4,12 +4,12 @@ title: Detectors
 
 # Detectors Index 
 
-- incorrect-shift
-- divide-before-multiply
-- transfer-from
-- incorrect-exp
-- msg-value-in-for-loop
-- unprotected-self-destruct
-- unchecked-send
-- is-unrecheable
-- bad-prng
+- [incorrect-shift](../Detectors/incorrect-shift.md)
+- [divide-before-multiply](../Detectors/divide-before-multiply.md)
+- [transfer-from](../Detectors/transfer-from.md)
+- [incorrect-exp](../Detectors/incorrect-exp.md)
+- [msg-value-in-for-loop](../Detectors/msg-value-in-for-loop.md)
+- [unprotected-self-destruct](../Detectors/unprotected-self-destruct.md)
+- [unchecked-send](../Detectors/unchecked-send.md)
+- [is-unreachable](../Detectors/is-unreachable.md)
+- [bad-prng](../Detectors/bad-prng.md)

solidity/codeql/docs/docs/readme.md

@@ -118,7 +118,7 @@ Shutting down query evaluator.
 | 5   | `divide-before-multiply` | Detects loss of precision  |
 | 6   | `incorrect-exp` | Detects use of bitwise xor instead of exponential   |
 | 7   | `unchecked-send` | The return value of a send is not checked    |
-| 8   | `is-unrecheable` | Detects dead code   |
+| 8   | `is-unreachable` | Detects dead code   |
 | 9   | `unprotected-self-destruct` | Detects unprotected call to selfdestruct/suicidal   |