fix: added symbols to stocks

stocks.yaml

@@ -540,6 +540,9 @@ companies:
   - yahoo: IFNNY
     google: OTCMKTS:IFNNY
     currency: USD
+  - yahoo: IFXA.F
+    google: FRA:IFXA
+    currency: EUR
   metadata:
     founded: 1999
     employees: 46665
@@ -2056,6 +2059,9 @@ companies:
   - yahoo: STWRY
     google: OTCMKTS:STWRY
     currency: USD
+  - yahoo: SWDAF
+    google: OTCMKTS:SWDAF
+    currency: USD
   metadata:
     founded: 1969
     employees: 4948
@@ -5579,6 +5585,9 @@ companies:
   - yahoo: RDSA.AS
     google: AMS:RDSA
     currency: EUR
+  - yahoo: R6C3.F
+    google: FRA:R6C3
+    currency: EUR
   metadata:
     founded: 1907
     employees: 86000
@@ -24410,6 +24419,9 @@ companies:
   - yahoo: ILIAY
     google: OTCMKTS:ILIAY
     currency: USD
+  - yahoo: ILIAF
+    google: OTCMKTS:ILIAF
+    currency: USD
   isins:
   - FR0004035913
   metadata: