RFR: 8310838: Correct range notations in MethodTypeDesc specification

[Chen Liang]

https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/lang/constant/MethodTypeDesc.html

These 3 typos are discovered while browsing the online documentation. It probably doesn't need a CSR for it doesn't change the specification at all.

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Commit messages:
 - 8310838: Correct range notations in MethodTypeDesc specification

Changes: https://git.openjdk.org/jdk/pull/14635/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14635&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310838
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/14635.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14635/head:pull/14635

PR: https://git.openjdk.org/jdk/pull/14635