ci: update golden instruction appendix

Author: ShashankVM

backends/instructions_appendix/all_instructions.golden.adoc

@@ -1,6 +1,6 @@
 = Instruction Appendix
 :doctype: book
-:wavedrom: /workspace/riscv-unified-db/node_modules/.bin/wavedrom-cli
+:wavedrom: /workspaces/riscv-unified-db/node_modules/.bin/wavedrom-cli
 // Now the document header is complete and the wavedrom attribute is active.
 
 
@@ -12951,7 +12951,7 @@ Included in::
 == fround.s
 
 Synopsis::
-No synopsis available
+Rounds single-precision float to integer
 
 Assembly::
 fround.s fd, fs1, rm
@@ -12963,7 +12963,13 @@ Encoding::
 ....
 
 Description::
-No description available.
+Rounds the single-precision floating-point number in floating-point register _fs1_ to an integer, according to the rounding mode specified in the instruction’s _rm_ field.
+
+It then writes that integer, represented as a single-precision floating-point number, to floating-point register _fd_.
+
+Zero and infinite inputs are copied to _fd_ unmodified.
+
+Signaling NaN inputs cause the invalid operation exception flag to be set; no other exception flags are set. FROUND.S is encoded like FCVT.S.D, but with rs2=4.
 
 
 Decode Variables::