fix(bom): correct Tolerance fields that contradicted their MPN

13 resistors carried Tolerance=5% while their MPN is a UNI-ROYAL 0402WG*F*
part -- F is the EIA code for +/-1% (J is 5%), and LCSC confirms the 1% rating.
The parts are 1%; only the metadata was wrong.

Worth fixing rather than leaving: the same part number appearing with two
different tolerances splits into two BOM lines under any grouping that
includes the field, and it misleads anyone sizing a divider.  R48 in the eFuse
ladder was one of these (fixed in a9052c6) and there it was load-bearing --
at a genuine 5% the OVLO worst case reaches 17.05 V, over U3's 17 V limit,
versus 14.42-15.83 V at the correct 1%.

Metadata only; no circuit or part number changes.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

hardware/re-bba-rb/ethernet.kicad_sch

@@ -10914,7 +10914,7 @@
 				)
 			)
 		)
-		(property "Tolerance" "5%"
+		(property "Tolerance" "1%"
 			(at 78.74 177.8 0)
 			(hide yes)
 			(show_name no)
@@ -12799,7 +12799,7 @@
 				)
 			)
 		)
-		(property "Tolerance" "5%"
+		(property "Tolerance" "1%"
 			(at 173.99 91.44 0)
 			(hide yes)
 			(show_name no)
@@ -13674,7 +13674,7 @@
 				)
 			)
 		)
-		(property "Tolerance" "5%"
+		(property "Tolerance" "1%"
 			(at 78.74 165.1 0)
 			(hide yes)
 			(show_name no)