fix(tiny-go): fix generated code in type_flags function

[rajatjindal]

prior to this fix, wit content as follows

    /// Flags determining the method of how paths are resolved.
    flags path-flags {
        /// As long as the resolved path corresponds to a symbolic link, it is
        /// expanded.
        symlink-follow,
    }

is generated as

(notice the dash between SYMLINK-FOLLOW)

type WasiFilesystem0_2_0_TypesPathFlags uint64
const (
WasiFilesystem0_2_0_TypesPathFlags_SYMLINK-FOLLOW WasiFilesystem0_2_0_TypesPathFlags = 1 << iota
)

After the fix:

type WasiFilesystem0_2_0_TypesPathFlags uint64
const (
WasiFilesystem0_2_0_TypesPathFlags_SymlinkFollow WasiFilesystem0_2_0_TypesPathFlags = 1 << iota
)

[rajatjindal]

requesting review from @Mossaka @alexcrichton

[alexcrichton]

Thanks! Mind dropping a test case for this in tests/codegen/*.wit as well?

[rajatjindal]

https://github.com/bytecodealliance/wit-bindgen/actions/runs/8470579347/job/23208633413#step:13:809 - added a testcase to demonstrate the failure